IR-GT Caliper – Part No: 120-6605
Call (805) 388-1188
Billet IR-GT
Prod #: 120-6605
Price: $485.94

Billet IR-GT - Product Summary
Caliper No: 120-6605
Image Coming Soon

Pistons
Piston Count 4
Piston Area (in²) 2.49
Piston Type Stainless
Dust Boot No
Rotor Dimensions
Rotor Width (in) 1.25
Rotor Diameter(in) 12.19
Pad Dimensions
Pad Area (in²) 5.64
Pad Volume (in³) 3.5
Duty Rating & Material
Material Billet Aluminium
Weight(Lbs) 3.2
Colors & Finish
Color Black
Finish Black Anodize

Mounting
Mount Center(in) 4.75
Mount Position
Mount Side Left Hand
Mount Type Radial
Product Documents
Product Data Sheet

Click To Download
Installation Instructions




WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Applicable to Brake Pads Only

120-6605 - Product Description

Billet IR-GT

The IR-GT4R Radial Mount Caliper is a rigid, lightweight, four piston radial mount design. With smaller piston volumes and thick pad capability, it is suited for a variety of rear brake applications.

The body is a product of FEA design and stress analysis technology. The fully CNC machined billet body features a closed bridge with grade 8 though bolts. Starting at 2.66 pounds it is the perfect balance between strength, low deflection, and lightweight. Caliper is fitted with steel pad load plates to reduce wear and provide smooth pad operation. A center bridge bolt adds strength and gives easy access to the top loaded pads.

PolyMatrix pads are available in several compounds to match brake torque and heat requirement to any competition application.


Vehicle Applications
Driving Environment Rally
Vehicle Sub-Types
Application Duty Heavy Duty
Driving Environment Road Race
Vehicle Sub-Types
Application Duty Heavy Duty
Driving Environment Late Model Asphalt
Vehicle Sub-Types ASA, All Pro, SW Tour, etc...
Application Duty Heavy Duty
Driving Environment Stock Cars
Vehicle Sub-Types NASCAR, BGN, CTS, ARCA, etc...
Application Duty Heavy Duty

Product Specifications

Rotor Compatibility
Rotor Width (in) 1.25
Maximum Rotor Width (in) 1.25
Minimum Rotor Width (in) 1.19
Maximum Rotor Diameter(in) 12.19
Minimum Rotor Diameter(in) 11.75

Brake Pad Specifications
Brake Pad Type 1 7620
Brake Pad Type 2 N-A
Brake Pad Type 3 N-A
Total Pad Area (in²) 5.64
Total Pad Volume (in³) 3.5
Mount
Piston Specifications
Piston 1 Bore (in) 1.38
Piston 2 Bore (in) 1.12
Piston 3 Bore (in)
Total Piston Area (in²) 2.49

Mounting Specifications
Mount Type Radial
Mount Side Left Hand
Mount Center(in) 4.75
Mount Hole Size(in) 0.39
Mount Height(in) 1.25
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers
Pad Dimensions for the Billet IR-GT Pad Dimensions for the Billet IR-GT
Axle Set P/N
Pad Type
Compound
Mount Dimensions for the Billet IR-GT Mount Dimensions for the Billet IR-GT Zoom Image
Mount Dimensions & Part Numbers

Dimensions for the Billet IR-GT Dimensions for the Billet IR-GT Zoom Image

Additional Notes

Stainless steel pistons are used for their slow heat transfer properties and high corrosion resistance. For extreme heat conditions, the IR-GT4R can be fitted with Wilwood’s exclusive design. Using EXP 600 Plus racing brake fluid will guarantee the best performance in all conditions.

Bracket kits are used to install the calipers in place of most 3.50" lug mount calipers. Radial mounting simplifies service and the bracket kits provide two planes of adjustment for precise alignment over the disc. Bracket kits include the radial mount bracket, studs, locknuts, and caliper alignment shims.


Parts & Accessories

O-Ring Kit 130-7218
Replacement Dust Boot N-A
Replacement Piston 1 200-7516
Replacement Piston 2 200-7513
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit N-A
Wear Plate L/H 300-5067
Wear Plate R/H 300-5066
Pad Retainer N-A
Bleed Screw Kit 220-0627
Self Bleeder Tube N-A
Cross-Over Tube N-A

Additional related products:




More Details
More Details





 
All images shown are for illustrative purposes only. Actual product received may be different than what is portrayed on the web site.
Wilwood makes every effort to maintain our web site to ensure the accuracy of prices and product information. However, product information and prices are subject to change without notice. Please call (805) 388-1188 before ordering to verify current prices and product information.
     Copyright ©2021 Wilwood Engineering, Inc. - All Rights Reserved     
Version: 3.05 June 23, 2023