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Stock BMW N20 valve springs are insufficient for high-lift cams and high RPMs
or track-focused builds
BMW F90 M5 CS (2021+)
Look for obvious defects or shipping damage
NOTE: Because the top of the fuel fill tube should not be higher than the location of this air filter
N53 Cylinder Head Service by 5150 AutoSport Service:Pro-Xtreme Stock BMW N20 valve springs5150 AutoSport Performance Cylinder Head Services for BMW N53 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
