5150 AutoSport Pro-Xtreme Forged Pistons for BMW S63 Engines

This reticulated foam is manufactured from polyurethane and meets MIL-DTL-83054C Type-II

Fits Tilton 800-Series and 900-Series pedal assemblies

The valve seal utilizes a high temperature resistant o-ring that is clamped in place to prevent the possibility of sticking to the seat and pulling out

performance and reliability

S55 Fire Ring Set F9X 5150 AutoSport Pro-Xtreme Forged Pistons5150 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