Don't have a machine shop up to the job

or competitive track use

Ferrea’s high-performance BMW N54 valve springs ensure your engine handles increased lift and RPMs without issue

High-Strength Alloy: Crafted from a forged aluminum alloy

BMW S58 Port Injection Kit 130612 Don't have a machine shopRK Autowerks Port Injection Kit for BMW S58 Engines The RK Autowerks Port Injection Kit is designed to meet the demands of high performance S58 builds. Whether you're chasing big horsepower or seeking to maximize fueling efficiency, this kit delivers reliable results without compromise. Precision CNC machined and tested in RKs Texas facility, each component reflects the brands commitment to engineering excellence. This kit is fully compatible with