performance and reliability

5150 AutoSport Pro-Xtreme Forged Pistons for BMW S63 Engines

and extended abuse—all while looking great under your car

3/8" thick laser-cut flanges ensure a warp-free

5GT Twin Turbo (JZX81)

S55 Fire Ring Set F9X performance and reliability5150 AutoSport Fire Ring Set for S55 Compatible with OEM Head Gaskets 5150 AutoSport Fire Rings are designed to enhance head gasket sealing in high performance BMW engines. Compatible with OEM head gaskets, these rings provide a superior seal for forced induction and high compression applications. Available in sets of six or eight, they help prevent head gasket failure under extreme conditions. Compatible with OEM head gaskets for a reliable and