It is precision ground and micro polished, Has straight shot oil holes and lightening holes in all rod throws, The aero-wing counterweights increase horsepower by reducing windage, Crankshaft is internally/neutral balanced on the front and externally balanced on the back of the crankshaft, This cast steel crank shaft is specially designed for the 383 Chevy small block V8's with 1-piece rear main seal blocks.
