The Wilwood 150-12270K is a 4908-pattern pad set in the brand's Purple compound, a composite metallic formula. The manufacturer positions it for high-temperature durability on aluminum and other low-conductivity alloy rotors, where a standard pad can struggle. Compared with a generic street pad, it is built for sustained track heat, and the manufacturer highlights long wear life and strong fade resistance under prolonged braking. Those traits justify the price for a sprint car, autocross, or track build that runs an aluminum or alloy disc.
Fitment is specific. The 4908 pad is matched to the Wilwood GP200 caliper, a two-piston design, so buyers should confirm their caliper before ordering. Each pad is 0.31 in thick with a 1.83 in² friction area, and the manufacturer lists the pads as unbedded, so they need a proper bedding procedure before hard use. Search terms like GP200 caliper pads, purple compound aluminum rotor brake pads, and 4908 pad set are the most relevant to this part.
The manufacturer's compatibility listing matches the 4908 pad to the Wilwood GP200 caliper. Confirm your caliper model with the manufacturer before ordering if it is not a GP200.
No. The manufacturer lists the pads as unbedded, so they need a bedding-in procedure before aggressive use.
The manufacturer describes the Purple compound for aluminum and other low-conductivity alloy rotors. For steel rotors, check with the manufacturer before installing.
These pads mount in a GP200 caliper, so the job is a pad swap rather than a full brake rebuild, but confirm the caliper and pad thickness match before you start. Because the manufacturer lists the pads as unbedded, plan a controlled bedding-in session after installation rather than hard stops on the first run. I did not locate an official install sheet with torque specs or step-by-step instructions, so check the manufacturer's documentation for those details before assembly.
