Wilwood 15A-9977K PolyMatrix A 6617 High Temperature Competition Brake Pads .67

High-Temperature Racing Brake Pads

Pad Number: 6617
Compound: PolyMatrix A

Pad Dimensions

Thickness (in.)

0.67

Area (in.²)

11.1

Volume (in.³)

5.2

Bed-In

No

Dust and Noise Rating

Dust Production Rating
N/A

Pad Noise Rating
N/A

PolyMatrix A Compound

Pad Characteristics

Very aggressive initial response
Maximum friction pad
Immediate response at low temperatures
Medium-low wear rate during sustained high-temperature braking
High fade resistance

Pad Applications

Race only - Not suitable for street use
Road course
Paved oval
Dirt, all categories

Rotor Material

Steel
Iron

Temperature range and overall friction value are the primary considerations for pad selection. Pads must maintain adequate friction for good stopping power within the temperatures they will reach on the track. Overall wear rate should also be considered. For most asphalt and road race applications, high-temperature compounds, above 1000°F (538°C), are generally required. Dirt track, drag racing, and high-performance street applications typically operate between 500°F and 1000°F (260°C and 538°C). Please note 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 friction loss (pad fade) occurs due to overheating, improved cooling, a heavier rotor, or pads with a higher temperature range may be necessary.

Wilwood Caliper(s) Compatible with Pad #6617