Friday, December 09, 2016
Brake Pad Part No: 15B-3993K-B

Brake Pad Guide Brake Pads Chart

Brake Pads
High-Temperature Racing Pads

Pad#:   7520
Compound:   PolyMatrix B
Wilwood Brake Pad Plate #7520

Wilwood Brake Pad Plate #7520
zoom image
<Go Back>

Call (805) 388-1188

Product Number: 15B-3993K-B     Price: $272.28
Pad Dimensions
Thickness(in): Area(in²): Volume(in³): Beded:
.80 11.1 6.9 Y
Temperature & Friction Ratings
Peak Temperture Rating: Peak Friction Rating:
1300+ F. 0.62
Dust & Noise Ratings
Dust Production Rating: Pad Noise Rating:
N-A 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 EnvironmentVehicle Sub-TypesApplication Duty
Rally Heavy Duty
Road Race Heavy Duty
Late Model Asphalt ASA, All Pro, SW Tour, etc...Heavy Duty
Stock Cars NASCAR, BGN, CTS, ARCA, etc... Medium Duty
Late Model Dirt STARS, UMP, IMCA, etc...Heavy Duty
Northeast Modified Dirt or PavementHeavy Duty
Open Wheel Sprint, Midget, etc… Dirt or PavementHeavy Duty
Off Road Heavy Duty

Pad Illustration and Dimensions
Wilwood Brake Pad Plate #7520 Large Drawing

Wilwood Brake Pad Plate #7520 Large Drawing


Compound Characteristics
PolyMatrix B

PolyMatrix B


Compound Data Sheet
Application:

  • Race ONLY compound is a value priced, proven workhorse for most weekly category asphalt late models, sprints, modifieds, and sportsman divisions.
  • Hard braking dirt late models, DIRT modifieds, and rear inboard sprint brakes with vented iron or steel rotors.
  • SCCA club racers, rally, and auto-cross.
  • High MPH drag cars if high end fade occurs with lower temperature pads.
Characteristics:

  • Traditional favorite for asphalt LM's, modifieds, and sprints.
  • Modifieds, late models, and other hard braking dirt applications.
  • Intermediate weight road course, auto-cross, rally.
  • Beds easily and fully compatible with all iron and steel.
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 # 7520
Grand National GN6R
Wilwood Grand National GN6R Caliper

Wilwood Grand National GN6R Caliper
zoom image
Grand National GN6R Caliper

Grand National GN6R forged aluminum six-piston radial mount calipers bring current state-of-the-art design, materials, and manufacturing technology to this long standing icon in the Wilwood caliper line. With a High-strength forged aluminum body in either hard-anodized or Quick-Silver nickel plate finish and Compatible with rotors from 1.25” to 1.38” thickness and diameters from 12.19” to 13.06”. Two body widths are available for use with .80” (20,3) or .99” (25,0) thick pads. Stainless steel pistons are included base model GN6R anodized calipers and Thermlock® pistons in the GN6R/ST Quick-Silver nickel plate models. Uses 3.5” or 6.0” center mount bracket kits to replace all previous Grand National caliper models. View Grand National GN6R Calipers
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
6 5.40 11.1
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
6.9 1.38 13.06
Grand National GN6R
Wilwood Grand National GN6R Caliper

Wilwood Grand National GN6R Caliper
zoom image
Grand National GN6R Caliper

Grand National GN6R forged aluminum six-piston radial mount calipers bring current state-of-the-art design, materials, and manufacturing technology to this long standing icon in the Wilwood caliper line. With a High-strength forged aluminum body in either hard-anodized or Quick-Silver nickel plate finish and Compatible with rotors from 1.25” to 1.38” thickness and diameters from 12.19” to 13.06”. Two body widths are available for use with .80” (20,3) or .99” (25,0) thick pads. Stainless steel pistons are included base model GN6R anodized calipers and Thermlock® pistons in the GN6R/ST Quick-Silver nickel plate models. Uses 3.5” or 6.0” center mount bracket kits to replace all previous Grand National caliper models. View Grand National GN6R Calipers
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
6 5.40 11.1
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
6.9 1.38 13.06
Grand National III
Wilwood Grand National III Caliper

Wilwood Grand National III Caliper
zoom image
Grand National III Caliper

Wilwood’s GN lll is a time proven caliper that has been widely used with 5 on 5 hubs for stock car, road course, and off-road competition. The 3.50" mount configuration (also available in 6.00” mount) incorporates this legacy of enduring performance, with options available for the latest brake system heat management technology. View Grand National Calipers
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
6 5.40 11.1
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
6.9 1.38 13.06
Grand National III
Wilwood Grand National III Caliper

Wilwood Grand National III Caliper
zoom image
Grand National III Caliper

Wilwood’s GN lll is a time proven caliper that has been widely used with 5 on 5 hubs for stock car, road course, and off-road competition. The 6.00" mount configuration (also available in 3.50” mount) incorporates this legacy of enduring performance, with options available for the latest brake system heat management technology. View Grand National Calipers
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
6 5.40 11.1
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
6.9 1.38 13.06