making them a trusted upgrade for both street and track applications

The provided 90 degree 6AN male fuel return fitting can swivel 360 degrees

providing enhanced stability and reducing load loss

providing you with peace of mind during even the most demanding driving conditions

S55 Cylinder Head Service by 5150 AutoSport Service:Pro-Xtreme making them a trusted upgrade5150 AutoSport Performance Cylinder Head Services for BMW S55 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