One-piece Solid Crank Hub FTWL BMW N55 S55 2009-2021

• One-piece crank hub for BMW N55 and S55 engines
• Eliminates the issue of the factory crank hub cracking
• Removes the weakest point of the S55 engine’s timing system, making it significantly more reliable at 600+ horsepower
• Manufactured on a multi-axis CNC lathe from a single setup
• Made from nitriding steel, surface nitrided to a depth of ~0.25 mm
• Achieves up to 65 HRC across the entire surface, which—unlike induction-hardened products—ensures wear protection for both the gear teeth and the surface working with the crankshaft seal lip. Additionally, the process occurs at a lower temperature and does not cause high internal stresses or material deformation
• Offer for installers who already have the tools and the crankshaft drilling fixture
• A complete kit with all necessary accessories for modifying the crankshaft is available in a separate listing