Precision Spring Seats: Designed for exact compatibility with S58 engines for optimal support

blow off valves

Stress-relieved to prevent fatigue and extend rod life

They are designed to replace BMW part #11241730420

Link Engine Management Fury X ECU 1303556 Precision Spring Seats: Designed forFuryX ECU Advanced Engine Management with Onboard Wideband The FuryX ECU is a high performance engine management system featuring Onboard Digital Wideband Lambda Control, offering precise tuning, faster processing, and extensive data logging capabilities. Built on the G4X platform, it delivers 512MB of data logging, faster communication speeds, and enhanced processing power for demanding motorsport and performance applications. Versatile Engine