Thursday, July 20, 2017
Brake Pad Part No: 15B-3998K
Brake Pad Guide Brake Pads Chart

Brake Pads
High-Temperature Racing Pads

Pad#:   D154
Compound:   PolyMatrix B
Wilwood Brake Pad Plate #D154

Wilwood Brake Pad Plate #D154 zoom image
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Product Number: 15B-3998K     Price: $139.44
Pad Dimensions
Thickness(in): Area(in²): Volume(in³): Beded:
.52 8.7 2.9 N
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 #D154 Large Drawing

Wilwood Brake Pad Plate #D154 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 # D154
D154 Single & Dual Piston Floater
Wilwood D154 Single & Dual Piston Floater Caliper

Wilwood D154 Single & Dual Piston Floater Caliper zoom image
 D154 Single & Dual Piston Floater Caliper

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
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
1 , 2 1.98 - 4.90 8.7
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
2.9 1.04 12.19
D154-R Single Piston Floater
Wilwood D154-R Single Piston Floater Caliper

Wilwood D154-R Single Piston Floater Caliper zoom image
 D154-R Single Piston Floater Caliper

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
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
1 3.14 - 4.90 8.7
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
2.9 1.04 12.19
GM-Metric Single Piston Floater
Wilwood GM-Metric Single Piston Floater Caliper

Wilwood GM-Metric Single Piston Floater Caliper zoom image
 GM-Metric Single Piston Floater Caliper

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
Caliper Dimensions
Piston Count: Piston Area Range (in²): Pad Area Range (in²):
1 4.45 8.7
Pad Volume Range (in³): Max Rotor Widths (in): Max Rotor Diameters (in):
2.9 1.25 11.75
GM-Metric-Iron Single Piston Floater
Wilwood GM-Metric-Iron Single Piston Floater Caliper

Wilwood GM-Metric-Iron Single Piston Floater Caliper zoom image
 GM-Metric-Iron Single Piston Floater Caliper

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