It is a MUST to drill and tap the four outer 9mm holes in the engine block to increase their size to 11mm holes

BMW S54 Stroker Kit Contents

Catless & High-Flow Downpipe Tuning: No compromises in power delivery or response

this BMW M52TU piston set features:

101-0239 Rugged 12 key CAN Keypad with interchangeable 15mm inserts (sold separately)

Mercedes M176 M177 M178 Piston Set SC7710 Flex Plate Bolt It is a MUST toThis Mercedes M176 M177 M178 Piston Set by CP Carrillo represents the highest quality pistons on the market, engineered for maximum power and durability. Utilizing high strength, lightweight materials and advanced engineering, this Mercedes Benz M176 M177 M178 piston set features: Lightweight Design: CP Carrillo pistons are made from high strength, lightweight materials, such as forged aluminum alloy. Reduced piston weight contributes to improved