X4F aluminum layshaft is strategically CNC-machined to reduce rotating fat without compromising power or integrity. The accuracy layshaft minimizes runout, eliminating drivetrain vibration and producing a confident security. The layshaft includes two exchangeable bearings to simply help expand reduce drivetrain vibration. The composite gear pulley key sturdily toward layshaft, along with the completed arranged is initiated inside engine mountââ¬â¢s steel layshaft axle. Machined from premium Swiss 7075 T6 aluminum and black colored colored anodized. Fits X4F