HRC Pro Series 4340 Crankshaft Big Block Chevy 4.500" Stroke, 6.535" Rod
100% American Made! the use of the finest high purity 4340 aircraft quality alloy. Forged by the experts at American crankshaft forgings, These forgings are shipped to the leader in high performance crankshaft machining, Callies Performance Products.. All journals have .125" Tru-Form fillet radii. 1" Angalite lightening holes in all rod throws. Callies Perma-Toughs these cranks to a depth of .080". This produces a wear layer that remains intact even if reground .060" under (other cranks have a hardness depth as little as ,003"). Journals are micro-finished to 5 microns or better. The best forgings, the best machining, and Perma-Tough hardening just what you would expect from a quality part.
NOTE: Requires chamfered bearings.