For GM 2771004 HYDRO-BOOST SEAL/REPAIR KIT 3 Piece. 3 Piece seal kit for repairs of Bendix Hydro-Boost Kit 2771. the kit is suitable for most hydroboost devices Ford Chevy GM Dodge Ram. For hydro-boost seal repair kit - solve the leakage problem between hydroboost and master cylinder for repairing Bendix hydro boost kit 2771004 and many other hydro boost devices. 3-piece hydro boost repair kit, seal leakage repair universal kit, which is compatible with Chevrolet, GMC, dodge and Ford hydro boost 3-piece universal seal leakage repair kit. This is a 3-piece repair kit, excluding metal star washers and other metal washer.