71-91 GM P/U Brake Booster 8in Dual Zinc

The LEED Brakes 71-91 GM P/U Brake Booster 8in Dual Zinc is a complete master cylinder and brake booster assembly engineered for full-size General Motors trucks and sport utility vehicles from 1971 through 1991. This is a dual diaphragm brake booster with an 8-inch outer diameter, paired with a 1-1/8 inch bore master cylinder featuring dual integral reservoirs. The gold zinc-plated steel construction provides corrosion resistance critical for long-term reliability in demanding off-road and weather-exposed applications where traditional brake systems fail prematurely.

The dual integral reservoir design eliminates the need for separate front and rear fluid containers, simplifying plumbing during restoration or brake system upgrades on classic GM trucks and SUVs. The dual diaphragm booster provides consistent pedal feel and stopping power across the full range of brake system pressures, while the 8-inch booster diameter balances compact engine bay fitment with adequate vacuum-assisted stopping force. The 1-1/8 inch master cylinder bore accommodates modern high-friction brake pads and contemporary hydraulic fluid while maintaining compatibility with original GM brake line fittings and hoses on vehicles spanning two decades of production.

This kit addresses the most common brake system failure point on vintage and collector GM full-size trucks and SUVs: deterioration of original booster and master cylinder assemblies that lose vacuum assistance or develop internal leaks over time. Rebuilding or replacing these components is essential for safe operation. The LEED Brakes unit arrives as a matched pair, eliminating compatibility guesswork and reducing installation time compared to sourcing individual components separately. Weight is 18.71 lbs.