Description
Genuine BMW Crankshaft, N63 S63, 4.4L 420i RK Autowerks B58 RK Billet Strength for Performance Driving S85 V10 CP FPS B58 82.5 9 Bore Options:93 mm RK Autowerks B58 RK Billet Port Injection Manifold – GEN1 135 mm rod compatibility for S52 engines