Standard crankshafts correspond to the original crankshaft; the ABE (General Operating Permit) remains valid. Sport crankshafts are not approved for road use (StVZO)! Sport crankshafts sometimes have polished connecting rods, and the modified crankshaft webs (full-circle webs) result in increased pre-compression and better gas flow. The higher rpms achieved lead to improved starting behavior and better overall performance. Recommended in conjunction with tuning cylinders. Type Item Design Crankshaft Features Standard