Wilwood Forged Narrow Superlite 4R Front Brake System - 4 Piston Caliper - 12.190 in Drilled / Slotted Rotor - Black Powder Coat - GM SUV / Truck 1963-87 39000509 125-300 lb/in Spring Rate

125-300 lb/in Spring Rate

2014-2017 Audi SQ5

1960-1962 Dodge Polara

437 in Spring

or others that have been decked

Wilwood Forged Narrow Superlite 4R Front Brake System - 4 Piston Caliper - 12.190 in Drilled / Slotted Rotor - Black Powder Coat - GM SUV / Truck 1963-87 39000509 125-300 lb/in Spring RateThe unsurpassed braking capacity of the Forged Narrow Superlite 4R four piston caliper serves as the base of this 12. 19" big rotor kit for the popular 1963 thru 1987 Chevrolet & GM C10 C15 Trucks with Wilwood's new Modular Drop Pro Spindles. SL4 kits are engineered application specific for simplified installation and full compatibility with OE master cylinder output and ABS functions where used. Big brake kits provide increased brake capacity and