CRANKSHAFT, a perfect compliment to our dual port 36hp engine kit, forged, 69.5mm stroke, 4340 steel alloy, connecting rod and main bearing journals have been nitride hardened to HV 500, counter weighted and balanced. 8-dowell flywheel interface in SPG pattern. Includes pushrod spacers, dowel pins and paper flywheel gaskets, made by Wolfsburg West 111198600