Brake Pad Part No: 15c-4420k

Call (805) 388-1188
High-Temperature Racing Pads :  Pad#:  D154
Compound:  PolyMatrix C
Prod #: 15C-4420K
Price: $145.13

Pad Dimensions
Thickness(in) .52
Area(in²) 8.7
Volume(in³) 2.9
Beded N
Temperature & Friction Ratings
Peak Temperture Rating 1300+ F.
Peak Friction Rating 0.57
Dust & Noise Ratings
Dust Production Rating N-A
Pad Noise Rating N-A
Performance Characteristics
  • Medium-high friction, soft medium temp response, often used as a biasing pad in rear.
  • Gentle rise to a flat torque curve
  • Low wear rate.
  • Medium-high friction, soft medium temp response, often used as a biasing pad in rear.
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
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, soft medium temp response, often used as a biasing pad in rear.
  • Gentle rise to a flat torque curve
  • Low wear rate.
  • Medium-high friction, soft medium temp response, often used as a biasing pad in rear.
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 # D154

D154 Single & Dual Piston Floater

Caliper Dimensions
Piston Count 1 2
Piston Area Range (in²) 1.98 4.90
Pad Area Range (in²) 8.7
Pad Volume Range (in³) 2.9
Max Rotor Widths (in) 1.04
Max Rotor Diameters (in) 12.19

D154 Single & Dual Piston Floater Calipers

Wilwood's D154 forged billet caliper is a direct bolt-on, lightweight, high-strength, extreme duty alternative to the OE cast iron calipers that were used on a wide range of factory disc brake equipped mid size GM cars and small trucks beginning in 1978. Use of this caliper can still be found on some GM models as late as the year 2002. The wide spread and affordable availability of D154 calipers and brake pad compounds also made it a popular choice in a number of restricted class competition categories and drum to disc conversions on all types of hot rods and street machines. View D154 Single and Dual Piston Floater Calipers
D154-R Single Piston Floater

Caliper Dimensions
Piston Count 1
Piston Area Range (in²) 3.14
Pad Area Range (in²) 8.7
Pad Volume Range (in³) 2.9
Max Rotor Widths (in) 1.04
Max Rotor Diameters (in) 12.19

D154-R Single Piston Floater Calipers

Wilwood's newest race caliper, the D154-R starts with a forged aluminum black anodized body with stainless steel piston. With a choice of 2.50” or 2.00” pistons and covering rotors from .81” to 1.04” thickness up to 12.19” diameter. Caliper fluid inlet port centered directly behind the piston eliminates any interference with slide pins. Lower deflection rate and higher volumetric efficiency than all the competitions’ heavier cast models, D154-R calipers with a 2.50" piston weighs only 3.3 pounds and use standard metric D154 pads. Caliper mounting uses stock height and offset. View D154-R Single Piston Floater Calipers
D154-R Single Piston Floater

Caliper Dimensions
Piston Count 1
Piston Area Range (in²) 3.14 4.90
Pad Area Range (in²) 8.7
Pad Volume Range (in³) 2.9
Max Rotor Widths (in) 1.04
Max Rotor Diameters (in) 12.19

D154-R Single Piston Floater Calipers

Wilwood's newest race caliper, the D154-R starts with a forged aluminum Type III hard anodized body with stainless steel piston. With a choice of 2.50” or 2.00” pistons and covering rotors from .81” to 1.04” thickness up to 12.19” diameter. Caliper fluid inlet port centered directly behind the piston eliminates any interference with slide pins. Lower deflection rate and higher volumetric efficiency than all the competitions’ heavier cast models, D154-R calipers with a 2.50" piston weighs only 3.3 pounds and use standard metric D154 pads. Caliper mounting uses stock height and offset. View D154-R Single Piston Floater Calipers
GM-Metric Single Piston Floater

Caliper Dimensions
Piston Count 1
Piston Area Range (in²) 4.45
Pad Area Range (in²) 8.7
Pad Volume Range (in³) 2.9
Max Rotor Widths (in) 1.25
Max Rotor Diameters (in) 11.75

GM-Metric Single Piston Floater Calipers

Wilwood’s GM Metric Caliper is a direct replacement for the 1978 and later D154 type GM metric caliper. Weights starting at 2.92 pounds, it provides a substantial weight savings over cast iron OE calipers. Requires use of hardened Wilwood slide pins (sold separately), request part no. 230-0619 (slide pin kit) contains 4 slide pins, enough for two calipers View GM Single Piston Calipers
GM-Metric-Iron Single Piston Floater

Caliper Dimensions
Piston Count 1
Piston Area Range (in²) 3.14 5.94
Pad Area Range (in²) 8.7
Pad Volume Range (in³) 2.9
Max Rotor Widths (in) 1.04
Max Rotor Diameters (in) 11.75

GM-Metric-Iron Single Piston Floater Calipers

These all new cast, not rebuilt iron calipers are bolt-on replacements for 1978 and later GM Metric calipers widely used in "spec" racing categories and low cost disc brake conversions. Requires use of hardened Wilwood slide pins (sold separately), request part no. 230-0619 (slide pin kit) contains 4 slide pins, enough for two calipers View GM Single Piston Calipers





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