EN40B billet, large radius snout with added .040" O.D. snout diameter. Good for short course, desert racing, even Ultra 4 and duner applications. Spool that bigger than stock turbo up quicker with a BC stroker crankshaft, CNC machined from EN40B billet round bar, the hardest material available with through hardening capabilities not possible on the standard 4340 steel. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential. Fully system balanced, ready to install.