PolyMatrix "D" compound pads have one of the highest cold friction torque values of any race pad material with strong resistance to fade or glaze during periodic sharp rises in rotor temperature. This makes it an excellent choice for light to moderate braking dirt tracks, drag racing and performance street category competition. "D" compound has a flat torque curve that provides immediate, predictable pedal response and superior modulation characteristics throughout the entire temperature range. Dirt track racers enjoy the positive response and smooth engagement qualities that won't upset the car during light braking on dry-slick race tracks. Drag racers can hold the car steady in the water and during staging, and benefit from the powerful feel of positive braking past the finish lights. Club sports racers experience the powerful stopping torque without excessive squeal and rotor wear.Pit Stop USA offers Wilwood Polymatrix D Type Brake Pads - GM D52 150-8939K at low everyday prices. Be sure to check out all of our products from Wilwood Engineering including Wilwood Engineering GM Pads (D52).