This High Quality Counter-Weighted Stroker Crank Was Developed With The Serious Racer In Mind. Multiple Die Stamp Forged From 4340 Chromoly (One Of The Strongest Materials Available For Crankshafts). Cranks Are Then Magna Fluxed, Shot Peened And All Journals Are Nitrided, Precision Ground And Micro Polished. Additional Features Include Cross Drilled, Chamfered Oil Holes, Dynamically Computer Balanced And Extra Long 8Mm Dowel Pins. Choose The Journal Size And Stroker Combination That Best Suits Your Application. Note: Stroker Cranks Require Machining Of Case And Possibly Other Internal Components, For Rod Clearance.