SKU: 415090
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.
| types | Hydraulics |
| year | 1988-1991 |
| make | Chevy, GMC |
| model | C/K Trucks |
| parts category | Clutch Master Cylinders |
| chassis | GMT400 |
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