SCAT's Superlight Crankshafts are manufactured from non-twist, single plane 4340 forgings. These crankshafts have straight shot and chamfered oil holes; large radius on all journals; lightening holes in all rod journals; aero wing counterweights. "RB" Block Wedge + HEMI 4340 Forged Superlight Crankshaft is bridged for increased strength as well as precision ground, heat treated and nitrided for superior wear resistance.