Quick-Silver / ST series W4AR/ST nickel plated forged billet calipers, with four Thermlock pistons, deliver championship proven performance with heavy duty stopping power and reliability for sustained high heat competition. W4AR/ST calipers incorporate race technology into a radial mount body design with widespread adaptability and an expanded rotor compatibility range from 12.19” to 15.00”, including track update options for all W4AR Big Brake kits. Thermlock pistons, high-temp seals, SRS bridge plates, and two-piece bleed screw assemblies are standard in all calipers. Four high-temp race only brake pad compounds in the 6617 pad type allow precise tuning of the brake response, friction requirements and temperature range for all types of high performance and competition applications.
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