Thursday, December 08, 2016
Hat No: 170-6947


Big Brake Hats

Big Brake Hat - Short Offset
Wilwood Big Brake Hat - Short Offset Hat

Wilwood Big Brake Hat - Short Offset Hat
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GT Series Big Brake Short Offset hats are precision machined from premium aluminum alloys for high strength and attention to minimized weight. Hats in this category feature threaded rotor mount holes for use with standard through-hole mount rotors. Threaded hole hats may also be used with T-Nuts or ...   Continue >>

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Product Number: 170-6947     Price: $134.93
Big Brake Hat - Short Offset - Product Summary
Hat Dimensions
Mount Hole Type: Rotor Bolt Circle (in): Hat Offset (in): Center Reg. (in):
Threaded 8 x 7.00 0.73 2.53
Hat Type
Material: Mount Style: Finish: Weight (Lbs.):
Aluminum Fixed Mount Black E-Coat 1.6
Bolt Circle Dimensions
Hat Bolt Circle 1: Hat Bolt Circle 2: Hat Bolt Circle 3:
5 x 4.50
Application Info
Application Note: Hat Bolt Kit Part #:
RSX 230-8390
Cautionary Info
Application Note:

Rotor Hat Applications
Driving EnvironmentVehicle Sub-TypesApplication Duty
Street Rods  Heavy Duty
Street Performance DomesticHeavy Duty
Street Performance ImportHeavy Duty
Road Race Heavy Duty
Off Road Heavy Duty

Rotor Hat Dimensions
Big Brake Hat - Short Offset Hat Drawing

Big Brake Hat - Short Offset Hat Drawing
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Additional Hat Dimensions
Rotor Mount Hole Size (in): 5/16-18
Shoe I.D. (in)
Clearance I.D. (in): 5.9
Face Thickness (in): 0.25
Hat Stud Diamenter - BC 1 (in): 0.5
Hat Stud Diamenter - BC 2 (in):
Hat Stud Diamenter - BC 3 (in):
Additional Notes:

Wilwood Compatible Rotors: Big Brake Hat - Short Offset
Drilled Steel Rotor
Wilwood Drilled Steel Rotor

Wilwood Drilled Steel Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12 0.35
Steel rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Steel Rotors
Drilled Steel Rotor
Wilwood Drilled Steel Rotor

Wilwood Drilled Steel Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.44 11.75 0.35
Steel rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Steel Rotors
Drilled Steel Scalloped Dynamic Mount Rotor
Wilwood Drilled Steel Scalloped Dynamic Mount Rotor

Wilwood Drilled Steel Scalloped Dynamic Mount Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.35
Steel rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Steel Rotors
Drilled Steel Scalloped Rotor
Wilwood Drilled Steel Scalloped Rotor

Wilwood Drilled Steel Scalloped Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.44 12.19 0.25 0.35
Steel rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Steel Rotors
GT 36 Curved Vane Rotor
Wilwood GT 36 Curved Vane Rotor

Wilwood GT 36 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.66 12.19 0.72 0.81
GT-36 curved vane rotors are built for the extreme conditions of professional motorsports. The superior heat absorption and dissipation characteristics of these heavy wall directional vane rotors are the keys to preventing heat fade and realizing long service life from the rotors and pads. All rotors are cast from premium grade, long grain carbon iron for long wear, thermal stability, and resistance to distortion. Every GT rotor is fully detail machined to eliminate stress points and unnecessary weight away from the pad sweep face. The faces and O.D. are precision turned to less than .001" for flatness, parallelism, and run-out. An asymmetrical face slot pattern provides smoother engagement through reduced harmonics and improved thermal balance between the I.D. and O.D. of the rotor. Every rotor is then individually dynamic balanced to provide vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 36 Curved Vane Rotor
Wilwood GT 36 Curved Vane Rotor

Wilwood GT 36 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12 0.81
Wilwood's GT 36 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available. View GT Rotors
GT 36 Curved Vane Rotor
Wilwood GT 36 Curved Vane Rotor

Wilwood GT 36 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.19 0.81
Wilwood's GT 36 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available. View GT Rotors
GT 36 Curved Vane Rotor
Wilwood GT 36 Curved Vane Rotor

Wilwood GT 36 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 0.81
Wilwood's GT 36 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest braking available. View GT Rotors
GT 40 Curved Vane Rotor
Wilwood GT 40 Curved Vane Rotor

Wilwood GT 40 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 1.25
GT-40 curved vane rotors are built for the extreme conditions of professional motorsports. The superior heat absorption and dissipation characteristics of these heavy wall directional vane rotors are the keys to preventing heat fade and realizing long service life from the rotors and pads. All rotors are cast from premium grade, long grain carbon iron for long wear, thermal stability, and resistance to distortion. Every GT rotor is fully detail machined to eliminate stress points and unnecessary weight away from the pad sweep face. The faces and O.D. are precision turned to less than .001" for flatness, parallelism, and run-out. An asymmetrical face slot pattern provides smoother engagement through reduced harmonics and improved thermal balance between the I.D. and O.D. of the rotor. Every rotor is then individually dynamic balanced to provide vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 48 Curved Vane Rotor
Wilwood GT 48 Curved Vane Rotor

Wilwood GT 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.19 1.25
Wilwood's GT 48 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest, vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 48 Curved Vane Rotor
Wilwood GT 48 Curved Vane Rotor

Wilwood GT 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 1.21
Wilwood's GT 48 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest, vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 48 Curved Vane Rotor
Wilwood GT 48 Curved Vane Rotor

Wilwood GT 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.72 1.25
Wilwood's GT 48 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest, vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 48 Curved Vane Rotor
Wilwood GT 48 Curved Vane Rotor

Wilwood GT 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.19 1.38
Wilwood's GT 48 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest, vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 48 Curved Vane Rotor
Wilwood GT 48 Curved Vane Rotor

Wilwood GT 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
13.06 1.38
Wilwood's GT 48 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest, vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
GT 48 Curved Vane Rotor
Wilwood GT 48 Curved Vane Rotor

Wilwood GT 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 1.25
Wilwood's GT 48 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Series asymmetrical face slot pattern and individual dynamic balancing, you are assured the smoothest, vibration free performance at any speed. These rotors provide the highest cooling capacity and longest service life for extreme braking short tracks and road course competition. View GT Rotors
HD 36 Curved Vane Rotor
Wilwood HD 36 Curved Vane Rotor

Wilwood HD 36 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.81
HD-36 Series directional vane rotors provide superior thermal stability and long service for asphalt late models, modifieds, open wheel, and most other types of high heat competition applications. All HD rotors are cast from premium grade, long grain carbon iron for long wear, high thermal stability and resistance to distortion. Thick wall pad sweep faces with directional cooling vanes provide superior heat absorption and dissipation qualities to prevent heat fade and realize long service life from the pads and rotors. All HD rotor faces are precision turned to less than .001" for flatness, parallelism, and run-out for smoother engagement and reduced vibration. View HD Rotors
HD 36 Curved Vane Rotor
Wilwood HD 36 Curved Vane Rotor

Wilwood HD 36 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.81
Wilwood's HD 36 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Our HD Series preparation includes full detail machining and smooth pad contact faces without slots. View HD Rotors
HD 40 Curved Vane Rotor
Wilwood HD 40 Curved Vane Rotor

Wilwood HD 40 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 1.25
HD-40 Series directional vane rotors provide superior thermal stability and long service for asphalt late models, modifieds, open wheel, and most other types of high heat competition applications. All HD rotors are cast from premium grade, long grain carbon iron for long wear, high thermal stability and resistance to distortion. Thick wall pad sweep faces with directional cooling vanes provide superior heat absorption and dissipation qualities to prevent heat fade and realize long service life from the pads and rotors. All HD rotor faces are precision turned to less than .001" for flatness, parallelism, and run-out for smoother engagement and reduced vibration. View HD Rotors
HD 48 Curved Vane Rotor
Wilwood HD 48 Curved Vane Rotor

Wilwood HD 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 1.21
Wilwood's HD 48 Curved Vane Spec-37 rotors are are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Our HD Series preparation includes full detail machining and smooth pad contact faces without slots. View HD Rotors
HD 48 Curved Vane Rotor
Wilwood HD 48 Curved Vane Rotor

Wilwood HD 48 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 1.25
Wilwood's HD 48 Curved Vane Spec-37 rotors are are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Our HD Series preparation includes full detail machining and smooth pad contact faces without slots. View HD Rotors
Solid Steel Rotor
Wilwood Solid Steel Rotor

Wilwood Solid Steel Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.44 12 0.35
Steel rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Steel Rotors
SRP Drilled Performance Rotor
Wilwood SRP Drilled Performance Rotor

Wilwood SRP Drilled Performance Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.66 12.19 0.72 1.1
SRP Drilled Performance Rotors feature a specially engineered directional cross drill and face slot pattern that improve brake response and pad performance throughout the entire range of light to heavy braking. The venting and cleaning action of the holes and slots will reduce pad glaze and disperse gasses and heat generated during the pad to rotor interface. The holes and slots also inhibit irregular pad compound build-up on the rotor faces resulting in smoother engagement and improved pedal response in all conditions. The material removed also contributes to lower rotating and unsprung suspension weight. View SRP Rotors
SRP Drilled Performance Rotor
Wilwood SRP Drilled Performance Rotor

Wilwood SRP Drilled Performance Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.19 0.81
SRP Drilled Performance Rotors feature a specially engineered directional cross drill and face slot pattern that improve brake response and pad performance throughout the entire range of light to heavy braking. The venting and cleaning action of the holes and slots will reduce pad glaze and disperse gasses and heat generated during the pad to rotor interface. The holes and slots also inhibit irregular pad compound build-up on the rotor faces resulting in smoother engagement and improved pedal response in all conditions. The material removed also contributes to lower rotating and unsprung suspension weight. View SRP Rotors
Super Alloy Drilled Rotor
Wilwood Super Alloy Drilled Rotor

Wilwood Super Alloy Drilled Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.44 0.35
Super Alloy Steel Rotors have applications in all types of motorsports. Steel rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. This could be anything from a hard stopping drag race car at the end of a quarter mile, or a high speed stock car coming in from a qualifier at a super speedway. Steel rotors can also be found in lighter weight open wheel cars such as sprints and modifieds, and a variety of light weight, open wheel road course racers. A special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Super Alloy Rotors
Super Alloy Scalloped Rotor
Wilwood Super Alloy Scalloped Rotor

Wilwood Super Alloy Scalloped Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 1.25
Our newest Super Alloy rotor in 11.75” diameter is targeted directly to Dirt Late Model and Modified racing. Wilwood’s proprietary Super Alloy material provides the lowest rotating and un-sprung weight, without degradation, shrinkage and warping like comparable Iron & Steel lightweight rotors. Super Alloy rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. Our special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Super Alloy Rotors
Super Alloy Scalloped Rotor
Wilwood Super Alloy Scalloped Rotor

Wilwood Super Alloy Scalloped Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 0.81
Our newest Super Alloy rotor in 11.75” diameter is targeted directly to Dirt Late Model and Modified racing. Wilwood’s proprietary Super Alloy material provides the lowest rotating and un-sprung weight, without degradation, shrinkage and warping like comparable Iron & Steel lightweight rotors. Super Alloy rotors provide a durable lightweight option in applications where sustained temperatures remain in the low to moderate range, and high heat spikes are only observed on an intermittent basis. Our special alloy and proprietary manufacturing processes give these rotors high resistance to thermal distortion with excellent friction and wear characteristics against the pads. View Super Alloy Rotors
Super Alloy Slotted Rotor
Wilwood Super Alloy Slotted Rotor

Wilwood Super Alloy Slotted Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12 0.36
Super Alloy Titanium Slotted Rotors are Sprint racing's lightest rotors at a weight of between 2.8 to 3 pounds. Wilwood’s proprietary Super Alloy Titanium greatly enhances the durability and lifespan of this rotor over comparable lightweight steel or iron rotors. A directional slotted surface allowing for full pad contact. This provides excellent high temperature stability, with rapid heat dissipation and consistent performance from the brake pads. The fine micro-finish surface beds quickly with new pads. It provides a cost effective, lightweight solution with quick response, long service life from the pads, and consistent braking at all temperatures. Lowered rotating weight promotes quick acceleration, deceleration, and improved handling. View Super Alloy Rotors
ULGT 16 Curved Vane Rotor
Wilwood ULGT 16 Curved Vane Rotor

Wilwood ULGT 16 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 0.99
Wilwood''s ULGT-16 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Combined with our proven GT Style asymmetrical face slot pattern, you are assured the smoothest braking available. View GT Rotors
ULHD 16 Curved Vane Rotor
Wilwood ULHD 16 Curved Vane Rotor

Wilwood ULHD 16 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 0.99
Wilwood''s ULHD-16 Curved Vane Spec-37 rotors are manufactured from a proprietary iron alloy developed to withstand extreme temperatures with the highest possible degree of resistance against distortion, warping, cracking, and wear. The formulation for this alloy is a derivative of technology and materials that were significant in the development of the extreme duty military spec rotors that are manufactured by Wilwood. Every Spec 37 rotor is precision machined to less than .001" run-out, flatness, and parallelism. Our HP Series preparation includes full detail machining and smooth pad contact faces without slots. View HD Rotors
Ulltralite 32 Vane Rotor Drilled
Wilwood Ulltralite 32 Vane Rotor Drilled

Wilwood Ulltralite 32 Vane Rotor Drilled
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.81 1.25
When it comes to rotors, racers are constantly searching for the ultimate balance between the lowest weight and the ability to effectively manage heat. Decreased rotating weight in the drive line provides quicker deceleration under braking and quicker acceleration out of the corners. Lower weight also benefits handling with improved spring and shock control over the unsprung suspension mass. Wilwood's ULD-32 drilled iron rotors provides effective lightweight options for sprints, late models, modifieds, and other competition applications that race in low to medium temperature ranges. View Ultralite Rotors
Ultralite 32 Curved Vane Rotor
Wilwood Ultralite 32 Curved Vane Rotor

Wilwood Ultralite 32 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 1.25
Ultra-Light UL-32 directional vane rotors provide an excellent balance of efficient cooling and lower rotating mass on hard braking dirt tracks or rear axle service on pavement cars. UL rotors are cast from premium grade, long grain carbon iron for long wear, high thermal stability, and resistance to distortion. UL-32 rotors are production machined and well suited to a wide range of sportsman racing categories. View Ultralite Rotors
Ultralite 32 Vane Rotor
Wilwood Ultralite 32 Vane Rotor

Wilwood Ultralite 32 Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.81
Ultra-Light UL straight vane rotors provide high value performance and rugged durability for a wide range of competition, high performance, and sport driving applications. Don't confuse these rotors with bargain priced off-brand named parts. Wilwood's modern manufacturing capability, combined with large scale economy, make it possible to offer this level of quality and performance at such an affordable price. View Ultralite Rotors
Ultralite 32 Vane Rotor
Wilwood Ultralite 32 Vane Rotor

Wilwood Ultralite 32 Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12 1.2 1.25
Ultra-Light UL straight vane rotors provide high value performance and rugged durability for a wide range of competition, high performance, and sport driving applications. Don't confuse these rotors with bargain priced off-brand named parts. Wilwood's modern manufacturing capability, combined with large scale economy, make it possible to offer this level of quality and performance at such an affordable price. View Ultralite Rotors
Ultralite 32 Vane Scalloped Rotor
Wilwood Ultralite 32 Vane Scalloped Rotor

Wilwood Ultralite 32 Vane Scalloped Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 1.25
When it comes to rotors, racers are constantly searching for the ultimate balance between the lowest weight and the ability to effectively manage heat. Decreased rotating weight in the drive line provides quicker deceleration under braking and quicker acceleration out of the corners. Lower weight also benefits handling with improved spring and shock control over the unsprung suspension mass. Wilwood's ULS-32 scalloped iron rotors provides effective lightweight options for sprints, late models, modifieds, and other competition applications that race in low to medium temperature ranges. View Ultralite Rotors
Ultralite 32 Vane Scalloped Rotor
Wilwood Ultralite 32 Vane Scalloped Rotor

Wilwood Ultralite 32 Vane Scalloped Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.81
When it comes to rotors, racers are constantly searching for the ultimate balance between the lowest weight and the ability to effectively manage heat. Decreased rotating weight in the drive line provides quicker deceleration under braking and quicker acceleration out of the corners. Lower weight also benefits handling with improved spring and shock control over the unsprung suspension mass. Wilwood's ULS-32 scalloped iron rotors provides effective lightweight options for sprints, late models, modifieds, and other competition applications that race in low to medium temperature ranges. View Ultralite Rotors
Ultralite HP 32 Curved Vane Rotor
Wilwood Ultralite HP 32 Curved Vane Rotor

Wilwood Ultralite HP 32 Curved Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 1.25
Ultra-Light ULHP-32 directional vane rotors provide an excellent balance of efficient cooling and lower rotating mass on hard braking dirt tracks or rear axle service on pavement cars. UL rotors are cast from premium grade, long grain carbon iron for long wear, high thermal stability, and resistance to distortion. ULHP-32 rotors offered the added performance and smoother operation of precision turned faces with less than .001" variation in flatness, parallelism, or run-out. View Ultralite Rotors
Ultralite HP 32 Vane Rotor
Wilwood Ultralite HP 32 Vane Rotor

Wilwood Ultralite HP 32 Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.19 1.1
Ultra-Light ULHP straight vane rotors provide high value performance and rugged durability for a wide range of competition, high performance, and sport driving applications. Don't confuse these rotors with bargain priced off-brand named parts. Wilwood's modern manufacturing capability, combined with large scale ecoNmies, make it possible to offer this level of quality and performance at such an affordable price. View Ultralite Rotors
Ultralite HP 32 Vane Rotor
Wilwood Ultralite HP 32 Vane Rotor

Wilwood Ultralite HP 32 Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
11.75 12.19 0.81
Ultra-Light ULHP-32 straight vane rotors provide an excellent balance of efficient cooling and lower rotating mass on hard braking dirt tracks or rear axle service on pavement cars. UL rotors are cast from premium grade, long grain carbon iron for long wear, high thermal stability, and resistance to distortion. ULHP-32 rotors offered the added performance and smoother operation of precision turned faces with less than .001" variation in flatness, parallelism, or run-out. View Ultralite Rotors
Ultralite HPS 32 Vane Rotor
Wilwood Ultralite HPS 32 Vane Rotor

Wilwood Ultralite HPS 32 Vane Rotor
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Rotor Dimensions
Rotor Diameter Range: Rotor Width Range:
12.19 1.1
Ultra-Light ULHP straight vane rotors provide high value performance and rugged durability for a wide range of competition, high performance, and sport driving applications. Don't confuse these rotors with bargain priced off-brand named parts. Wilwood's modern manufacturing capability, combined with large scale ecoNmies, make it possible to offer this level of quality and performance at such an affordable price. View Ultralite Rotors