SX6R calipers were designed for the specific purpose of providing high capacity braking with large diameter rotors for extreme duty and race vehicles. It is the largest dual purpose caliper Wilwood has produced, providing big brake performance for show and dual purpose street and track vehicles. Offering additional enhanced braking with wheel and tire upgrades. Kits are fully compatible with OE master cylinder output and ABS function. Directional 72 staggered vane 14.00†to 15.00â€rotors provide maximum cooling for sustained high heat durability.