Brake Pad Part No: 15b-3991k

Call (805) 388-1188
High-Temperature Racing Pads :  Pad#:  7112
Compound:  PolyMatrix B
Prod #: 15B-3991K
Price: $113.73

Pad Dimensions
Thickness(in) .49
Area(in²) 6.36
Volume(in³) 2.1
Beded N
Temperature & Friction Ratings
Peak Temperture Rating 1300+ F.
Peak Friction Rating 0.62
Dust & Noise Ratings
Dust Production Rating N-A
Pad Noise Rating N-A
Performance Characteristics
  • Medium-high friction, good cold response
  • Gently rising torque curve, predictable engagemnet
  • Low wear rate at medium temperatures, increasing to moderate at high temperature.
  • Medium-high friction, good cold response
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 Medium Duty
Driving Environment Late Model Dirt
Vehicle Sub-Types STARS, UMP, IMCA, etc...
Application Duty Heavy Duty
Driving Environment Northeast Modified
Vehicle Sub-Types Dirt or Pavement
Application Duty Heavy Duty
Driving Environment Open Wheel
Vehicle Sub-Types Sprint, Midget, etc… Dirt or Pavement
Application Duty Heavy Duty
Driving Environment Off Road
Vehicle Sub-Types
Application Duty Heavy Duty

Compound Characteristics



Compound Data Sheet
Use & Caution
  • Medium-high friction, good cold response
  • Gently rising torque curve, predictable engagemnet
  • Low wear rate at medium temperatures, increasing to moderate at high temperature.
  • Medium-high friction, good cold response
Compound Temperature Range & Torque Values
Temperature range and overall friction value are the primary considerations for pad selection. The pads must be capable of maintaining the proper amount of friction for stopping power within the temperatures that will be realized on the track during the event. Then, overall wear rate must be considered. For most asphalt and road race applications, compounds in the high temperature ranges over 1000°F range are usually necessary. Dirt track, drag race, and street performance applications usually operate at temperatures between 500° and 1000°F. Keep in mind that these are general ranges, and not absolute values. Many factors and unforeseen influences can affect brake temperatures. The best indicator for pad selection will always be on track performance. If pad fade (friction loss) due to overheating occurs, then improved cooling, a heavier rotor, or a higher temperature range pad may all become necessary.

Wilwood Compatible Calipers: Pad # 7112

Forged Dynalite

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 3.00 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.27
Max Rotor Diameters (in) 13.06

Forged Dynalite Calipers

The Forged Billet Dynalite has wide spread application over many forms over motorsports. It serves as the base model in the majority of Wilwood's Bolt-On Disc Brake Kits. The latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. View Forged Dynalite Calipers
Forged Dynalite Internal

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 1.98 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.13
Max Rotor Diameters (in) 13.06

Forged Dynalite Internal Calipers

The Forged Billet Dynalite Internal is the next generation enhancement of the venerable Forged Dynalite series calipers. Designed with a single split bridge and spacer less design to enhance strength and appearance. These latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. This new spacer-less design of the Forged Dynalite series of calipers, makes this the stiffest and most visual pleasing design so far. View Forged Dynalite Internal Calipers
Forged Dynalite Internal

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.04
Max Rotor Diameters (in) 13.06

Forged Dynalite Internal Calipers

The Forged Billet Dynalite Internal is the next generation enhancement of the venerable Forged Dynalite series calipers. Designed with a single split bridge and spacer less design to enhance strength and appearance. These latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. This new spacer-less design of the Forged Dynalite series of calipers, makes this the stiffest and most visual pleasing design so far. View Forged Dynalite Internal Calipers
Forged Dynalite Internal Polished

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 3.00 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.04
Max Rotor Diameters (in) 13.06

Forged Dynalite Internal Polished Calipers

The Forged Billet Dynalite Internal is the next generation enhancement of the venerable Forged Dynalite series calipers. Designed with a single split bridge and spacer less design to enhance strength and appearance. These latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. This new spacer-less design of the Forged Dynalite series of calipers, makes this the stiffest and most visual pleasing design so far. View Forged Dynalite Internal Calipers
Forged Dynalite Internal-Dust Seal

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 3.00 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 0.83
Max Rotor Diameters (in) 13.06

Forged Dynalite Internal-Dust Seal Calipers

The Forged Billet Dynalite Internal-Dust Seal is the further enhancement of the venerable Forged Dynalite series calipers. Designed with a single split bridge and spacer less design to enhance strength and appearance. These latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. This new spacer-less design of the Forged Dynalite series of calipers, makes this the stiffest and most visual pleasing design so far. Now with The addition of Wilwood’s exclusive wiper dust seal allows these calipers to be used in areas that may mandate environmental sealing. View Forged Dynalite Internal-Dust Seal Calipers
Forged Dynalite Internal-Dust Seal

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 0.83
Max Rotor Diameters (in) 13.06

Forged Dynalite Internal-Dust Seal Calipers

The Forged Billet Dynalite Internal-Dust Seal is the further enhancement of the venerable Forged Dynalite series calipers. Designed with a single split bridge and spacer less design to enhance strength and appearance. These latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. This new spacer-less design of the Forged Dynalite series of calipers, makes this the stiffest and most visual pleasing design so far. Now with The addition of Wilwood’s exclusive wiper dust seal allows these calipers to be used in areas that may mandate environmental sealing. View Forged Dynalite Internal-Dust Seal Calipers
Forged Dynalite Polished

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 3.00 4.12
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.27
Max Rotor Diameters (in) 13.06

Forged Dynalite Polished Calipers

The Forged Billet Dynalite has wide spread application over many forms over motorsports. It serves as the base model in the majority of Wilwood's Bolt-On Disc Brake Kits. The latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. View Forged Dynalite Calipers
Forged Dynalite-M

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 4.80
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.27
Max Rotor Diameters (in) 13.06

Forged Dynalite-M Calipers

The Forged Billet Dynalite-M is further enhancement of the venerable Forged Dynalite series calipers. Specifically designed to enhance outboard clearance and is the basis for Wilwood’s new Classic Style brake kits. The latest applied developments and innovations in caliper design and manufacturing processes have resulted in substantial improvements in strength and performance over all comparable models. View Forged Dynalite-M Calipers
Forged Dynalite-ST

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 3.00 4.12
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 0.83
Max Rotor Diameters (in) 13.06

Forged Dynalite-ST Calipers

The Forged Billet Dynalite/ST has been specifically designed for high temperature road racing series compact cars. Teamed with Wilwood’s exclusive Thermlock insulated pistons, it gives a small size, high temperature solution for rotors in the 12.19” to 11.00” ranges. The Forged Dynalite are the strongest calipers in the class, with weights starting at 2.90 pounds. The process of stress-flow forging re-aligns the metal's grain structure within the contour of the caliper body. This process eliminates the breaks and interruptions to the internal grain structure that occur when machining a straight block billet. The FEA generated radial transition design eliminates steps and shoulders in the area between the piston housing body and the caliper bridges. With the overall greater strength and reliability of the forging, the reduced deflection tendencies and the resulting decrease in fluid volume displacement translate to increased clamping efficiency with less pedal travel. The bottom line is a taller pedal and better stopping power. View Forged Dynalite Calipers
Polished Billet Dynalite

Caliper Dimensions
Piston Count 4
Piston Area Range (in²) 3.00 4.12
Pad Area Range (in²) 6.36
Pad Volume Range (in³) 2.1
Max Rotor Widths (in) 1.27
Max Rotor Diameters (in) 13.06

Polished Billet Dynalite Calipers

The Billet Dynalite caliper is powerful, compact, and super lightweight. Advanced computer engineering keeps this caliper extremely rigid resulting in incredible brake torque at a bare minimum in weight - only 2.5 pounds. Internal fluid crossover eliminates external tubes and the four position, two-piece bleed screws allow for convenient mounting and easy bleeding. View Billet Dynalite Calipers





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