B46 / B48 Fire Ring Set G80 Double-D keyed shaft and drive

Double-D keyed shaft and drive gear

Honor your machine

SuperTech High Performance Exhaust Valves

is made from a material that has a tensile strength of 260 ksi

B46 / B48 Fire Ring Set G80 Double-D keyed shaft and drive5150 AutoSport Fire Ring Set for B46 B48 Engines 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