- Reduced Gasket Wear: The O-rings provide additional support to the head gasket

190    1

KW V4 Clubsport

Triple Groove Keepers: Maintains OEM compatibility while ensuring secure valve retention

Gen 1 and 2

BMW M52TU M54 Block Sleeving Service 72-903 - Reduced Gasket Wear: TheBMW M52TU M54 Engine Block Sleeving Service If you're planning to make serious power with your M52TU or M54, the factory aluminum cylinder bores eventually become the limiting factor. Whether you're building a turbo street car, drift car, drag car, or dedicated race engine, sleeving the block is one of the best investments you can make for long term reliability. At 5150 Autosport, we don't sleeve blocks because it sounds good, we sleeve them because