The RK Autowerks Port Injection Kit is designed to meet the demands of high-performance S58 builds

Made from high-quality materials

5mm Exhaust Valves

Approximately 30% lighter than steel rods

Sold as a Kit - Front & Rear Bushings

M50 M52 S50 S52 CNC Cylinder Head Porting Engine:S50 The RK Autowerks Port Injection5150 AutoSport 5 Axis CNC Cylinder Head Porting for BMW M50 M52 S50 S52 Engines Please note that price is based on customer providing disassembled, clean core. If you need help sourcing a core, please contact our sales team. Also note that this service includes a 1 2 week turnaround time for service completion, beginning when the 5150 Team receives your head. Investing in cylinder head porting for your high performance BMW engine enhances airflow