Vacuum Power Brake Booster for Ford Bronco 1978, F-100 1977-1979, F-150 1977-1979, F-250 1977-1979 (Single Piston Caliper, without Master Cylinder) | OEM# 54-73703, D7TZ2005A, D7TZ2005H

Compatible with FordBronco 1978 ｜All EnginesF-100 1977–1978 ｜All EnginesF-100 1979 ｜All Engines ｜To Serial # DJ0,000F-150 1977–1978 ｜All EnginesF-150 1979 ｜All Engines ｜To Serial # DJ0,000F-250 1977–1978 ｜All Engines ｜With Single Piston CaliperF-250 1979 ｜All Engines ｜With Single Piston Caliper; To Serial # DJ0,001Brake Booster Diaphragm Style SingleColor GrayDiaphragm Diameter (IN) 10.75Diaphragm Diameter (MM) 273.05Master Cylinder Included NoMaterial Steel

• Vehicle Compatibility：Compatible with Ford Bronco 1978 (All Engines),Compatible with Ford F-100 1977–1979 (All Engines, to Serial # DJ0,000),Compatible with Ford F-150 1977–1979 (All Engines, to Serial # DJ0,000),Compatible with Ford F-250 1977–1979 (All Engines with Single Piston Caliper, to Serial # DJ0,001), all without Master Cylinder.
• OEM Replacement Numbers：54-73703, D7TZ2005A, D7TZ2005H.Fully interchangeable with the original factory part. Please confirm your OEM number or vehicle configuration before purchasing.
• Restore Braking Performance：Effectively restores vacuum pressure and braking assist function. Provides stable braking force, reduced pedal effort, and a smooth, consistent braking response in all driving conditions.
• Easy Installation：Designed as a direct-fit replacement for the factory unit — no modification or special tools required. Connects directly to the existing master cylinder and vacuum hose for quick and clean installation.
• Durable Construction：Built with reinforced steel housing and high-quality diaphragm materials to resist corrosion, deformation, and leakage. Each unit is individually tested to ensure long-lasting and reliable performance.