they optimize power output and enhance engine efficiency

(M3 models up to 1996) with the bush in the subframe

and reduce bore distortion

Tapered Rods are compatible with factory pistons while Non-Tapered Rods required aftermarket pistons

This Honda B16A piston set features:

M40 / M42 / M43 / M44 CNC Cylinder Head Service by 5150 AutoSport Engine:M44 they optimize power output and5150 AutoSport Performance Cylinder Head Services for BMW M40 M42 M43 M44 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