Vevaxel ZRP - Honda F20 Slag : 84mm Ramlagertapp : 55mm Vevlagertapp : 48mm Vikt : 13,5kg Material : 4340 Billet Allmän info : standard slag, lättviktsdesign The ZRP crankshaft for BMW M3 S50B30 is manufactured from aerospace grade 4340 solid billet steel and no compromises have been made to the quality of the material, in order to ensure the best possible product. This crankshaft designed carefully from our vast experience, to provide the best possible engine performance and the production process consist of very strict inspections to ensure that they have the best quality and tight tolerances for perfect fitment. The BMW crankshaft is fully balanced to 2gr.cm +/- 0.1 using state of the art Sunnen machines, balance results report included. Check the individual features for your application below. Product Features and Design Undercut profiled counterweights to minimize weight and reduce rotating mass. Aero-Wing counterweights for reduced windage to increase horsepower Drilled rod journ