The Wilwood Forged Superlite 4R caliper pairs differential or symmetrical piston arrangements with a 1.12/1.12-inch piston layout for use with 0.81-inch disc applications. The FSL4R series replaces external fluid crossover tubes with internal ports and allows symmetrical-bore models to be mounted right or left in either leading or trailing positions; differential-bore models still require dedicated left and right orientation, simplifying installation choices.
Wilwood Caliper-Forged Superlite 4R 1.12/1.12in Pistons 0.81in Disc