Kotte Crank Hub for the M2/M3/M4 models is a customized solution for the S55 engine. It replaces the standard three-part crank hub with a one-piece, robustly constructed version. This one-piece crank stroke offers increased stability and reliability by eliminating the risk of misaligned timing. This upgrade is crucial for the performance and longevity of S55 engines and offers a safe improvement over the original design.
