The Wilwood Narrow Superlite 4R rear disc kit for Big Ford old‑style rear axle applications is a forged big‑brake retrofit designed to add reliable rear stopping and parking hold. It matches FNSL4R four‑piston calipers with two‑piece 13" or 14" rotors and BP‑10 pads to deliver balanced braking that complements front upgrades. A concealed internal shoe provides superior static parking hold and a tidy installation; finish choices are available.
Wilwood Narrow Superlite 4R Rear P-Brk Kit 12.88in Drill Polish Big Ford Old Style 2.36in Offset