2771004 Hydro-Boost Repair Kit (Exact Duplicate) The KIT-501 Hydroboost Repair Kit (interchangeable with part number 2771004) is a universal complete seal kit designed to rebuild Bendix and various other hydraulic brake booster unitsThis kit serves as an exact duplicate replacement package to fix fluid leaks and restore proper braking system pressure.
Vehicle Makes: Works for hundreds of applications across GM, Ford, Chrysler, and MOPAR vehicles. Bore Specifications: The included metal star retainer washer specifically fits early units featuring a 1.6-inch bore prior to 2002. For newer vehicle models (2003 and later) with a 1.8-inch bore, the original star washer must be cleaned and reused. Exclusions: This kit does not work with staked pedal rods unless you explicitly cut and re-weld them (which is generally discouraged). It focuses purely on seals and does not include the accumulator, internal springs, or replacement rods.
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