These pistons feature offset wrist pin design

Please note that any engine modifications should be done carefully by a qualified professional to ensure optimal performance and reliability

2013-17 BMW F33 420i2013-17 BMW F33 425d

Some fittings will not be used

aligned horizontally - an aerodynamic design that creates a vacuum force while driving

B58 Fire Ring Set SCR12559 These pistons feature offset wrist5150 AutoSport Fire Ring Set for B58 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