This adapter is commonly used with old FCST units which had a small vent

Each component in this combo is precision-engineered from high-strength forged aluminum alloy for durability and performance

making live adjustments and refining your tune based on real-world data

with ARP Connecting Rod Bolts—the ultimate choice for strength

minimizing the risk of failure

S50B30 S50B32 Cylinder Head Service by 5150 AutoSport 7218 This adapter is commonly used5150 AutoSport Performance Cylinder Head Services for BMW S50 EURO 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