Issues relating to the standard three-piece crank hub on the S55 engine are widely known, but include the need to ensure the OE crank bolt can’t loosen, which is one cause of the crank hub friction plates starting to slip.
Issues relating to the standard three-piece crank hub on the S55 engine are widely known, but these are fully addressed with the installation of the Insane Performance one-piece billet crank hub kit.