Recommendation: For those pushing their S55 to the absolute limits

1/8" NPT threaded port is required for installing

5150 AutoSport Performance Cylinder Head Services for BMW B46 Engines

Genuine BMW OEM Head Gasket Set for BMW N63 engine

BMW F1X M5 / M5 S63 Downpipes Alpina B5 Recommendation: For those pushing theirUpgrade your BMWs performance with RK Autowerks Catless Race Downpipes for the F10 M5 and F06 F12 F13 M6 equipped with the S63 engine. Designed to eliminate the restrictive factory catalytic converters, these downpipes dramatically reduce backpressure and allow your turbos to spool faster for sharper throttle response and immediate gains in horsepower and torque. Each set is engineered using advanced 3D scanning and prototyping technology to ensure