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

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

If you’re still running the weak factory plastic clutch master cylinder in your GM truck, it’s time for an upgrade. The FABbot Wilwood Clutch Master Cylinder Conversion Kit is engineered for strength, precision, and superior pedal feel—a massive improvement over the stock setup.

Built for 1988–1991 GM C/K OBS trucks, this kit eliminates the common failures of the OEM unit, giving you smoother clutch engagement, firmer feedback, and long-term reliability. Whether your truck is daily-driven, used for towing, or built for performance, this conversion delivers the control you need.

Kit Includes:

• 3/4" Wilwood Clutch Master Cylinder – Compact, durable, and proven in performance applications

• FABbot Billet Wilwood Master Cylinder Adapter – CNC-machined for precise fitment

• FABbot Billet Clutch Master Cylinder Clevis – Ensures accurate geometry and smooth pedal motion

• -3AN or -4AN Banjo Fitting with Crush Washers & Banjo Bolt – Provides a clean, leak-free hydraulic connection

• New GM OEM Clutch Clevis Bushing – Restores factory-quality pedal articulation

• All Required Installation Hardware

Reuses your factory firewall gasket during installation.

Vehicle Fitment:

Chevrolet

• C1500 Pickup (1988–1991)

• C2500 Pickup (1988–1991)

• C3500 Pickup (1988–1991)

• G10 (1988–1989)

• G20 (1988–1989)

• G30 (1988–1989)

• K1500 Pickup (1988–1991)

• K2500 Pickup (1988–1991)

• K3500 Pickup (1988–1991)

GMC

• C1500 Pickup (1988–1991)

• C2500 Pickup (1988–1991)

• C3500 Pickup (1988–1991)

• G1500 (1988–1989)

• G2500 (1988–1989)

• G3500 (1988–1989)

• K1500 Pickup (1988–1991)

• K2500 Pickup (1988–1991)

• K3500 (1988–1991)

• P3500 (1990–1991)

Why Choose FABbot:

FABbot components are designed by enthusiasts who understand what performance driving demands. Each part is precision-machined from billet aluminum and tested for strength, fit, and long-term reliability. This Wilwood conversion kit removes the weak points of the factory clutch system, giving your GM truck:

• Improved pedal feedback and feel

• Consistent clutch engagement

• A durable, maintenance-free upgrade

📞 Questions or want to check stock?
Call our sales line at 763-670-6941 — we’re happy to help!