Quick-Silver / ST FNSL6R six piston calipers add the option of the new nickel finish and 6 Thermlock pistons to the most popular calipers used in our Big Brake kit line. Forged narrow Superlite calipers integrate "Big Brake" style with Wilwood's latest technology to generate big stopping power over a broad range of vehicle applications. Thermlock insulated pistons, high-temp seals, SRS bridge plates, and two-piece bleed screw assemblies are standard in all calipers. Three high performance street, and four high-temp race only brake pad compounds in the 7416 pad type, allow precise tuning of the brake response, friction requirements and temperature range for all types of high performance and competition applications.