Bugpack flanged forged chromoly 82mm stroker crankshaft with Type 4 main journals and Chevy rod journals. This 6-pin and 6-bolt flanged crankshaft opens up plenty of options for high horsepower engine builds. 82mm Stroke Type 4 Main Journals, Chevy Rod Journals Flanged 6 Bolt, 6 Pin EMP-B4-0003-1