Selecting the 1mm oversize valve option requires the installation of copper valve seats for proper fitment and sealing

making precise valvetrain control essential for avoiding lifter noise

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different diameter pumps can be used

Time Attack

S14 Cylinder Head Service by 5150 AutoSport Service:Pro-Xtreme Selecting the 1mm oversize valve5150 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