FTP F2X F3X Three-cylinder engine B38 Charge pipe+ Boost pipe*Increased Flow *Direct OEM Replacement *Caliber increase *3 Ply Silicon Couplers * bung for water injection *never blow up again For maximum effect, The FTP Charge Pipe both increases flow and improves the reliability of your B38 engine BMW. The aluminum pipe replaces the brittle factory plastic pipe which can fail under increased boost pressure. The increased piping size helps to reduce turbulence and maximize flow into the engine. FTP parts number