Check the listing for details. Exact Duplicate Complete Seal Kit 2771004 For GM Hydroboost Repair Kit New. Condition: New. Listed at 7.99 USD. Part Number: 2771004 Includes: As the pictures shown Fit For： This kit Repairs Bendix and many other Hydro-boost units. Works for 100's of applications including Ford, GM, Chrysler. This is a complete hydro-boost repair kit. It includes everything you may need to repair your unit and get it back on the road! There are other versions of this kit with only a couple seals, but buying those kits is like changing the oil in your car but using the same old filter! As long as you have your hydro-boost broken apart, you should replace the old with all new seals! Please note that the star retainer washer will not work on vehicles newer than 2002. Step by Step Instructions included with each kit, however, all hydro boost units are different. The best way to get step by step instructions is to go.