leading to leaks and improper lubrication of your mighty S55

4L S63 V8 engine

stiffness and packaging can become issues

T304 Stainless Steel construction with mandrel bends

CAT Cams helps your S54 engine perform at its peak

Race-Spec P54 Headers for E46 M3 by 5150 AutoSport 23-65000H leading to leaks and improperThe 5150 AutoSport Race Spec P54 Header for E46 M3 is engineered for serious motorsport performance, drawing direct inspiration from BMWs legendary P54 race engine. Designed to maximize exhaust flow and reduce backpressure, this header is built to support high revving S54 engines under extreme racing conditions. Crafted from high grade stainless steel, it delivers exceptional durability and thermal stability while maintaining precise fitment for the