S14 Cylinder Head Service by 5150 AutoSport Service:Stage 2 Stock valve springs are not

Stock valve springs are not engineered to handle the increased lift and RPMs demanded by high-performance BMW S54 engines

turbocharged builds

Choose CP pistons for high-powered track days or Arias pistons for intense street driving

Specialty Tuning for Catless Setups: Maximize performance for vehicles without catalytic converters

S14 Cylinder Head Service by 5150 AutoSport Service:Stage 2 Stock valve springs are not5150 AutoSport Performance Cylinder Head Services for BMW S14 Engines Please note that price is based on customer providing core. If you need help sourcing a core, please contact our sales team. Investing in a performance cylinder head service is crucial for optimizing engine potential in performance builds. We offer three levels of service to meet your budget and build goals, from OEM refresh to full race level machining: Stage 1 OEM Refresh (Rebuild