1988–1991 GM C/K OBS Trucks - Clutch Master Cylinder Conversion Kit

Clutch Master Cylinder Conversion Kit – 1988–1991 GM C/K OBS Trucks

Wilwood Clutch Master Cylinder Conversion for 88–91 GM OBS Trucks

Upgrade your GM OBS truck clutch system with a 3/4" Wilwood master cylinder conversion designed to eliminate factory weak points and improve pedal feel, control, and durability.

Key Benefits & Features

• Replaces weak OEM plastic master cylinder
• Improves pedal response and engagement consistency
• Billet adapter ensures accurate fitment
• Includes AN banjo fitting for leak-free connection
• Built for performance, towing, and daily use

Included Components

• 3/4" Wilwood master cylinder
• Billet adapter plate
• Billet clevis
• Banjo fitting kit with hardware
• OEM clevis bushing

Fitment & Compatibility

• 1988–1991 Chevy and GMC C/K trucks, vans, and SUVs
• Manual transmission and swap applications

Installation Notes

• Reuses factory firewall gasket

Engineered for strength and reliability, this kit provides a firmer pedal, smoother engagement, and a long-term upgrade over failure-prone factory components.