Manley 190290 - 4340 Crankshaft Non-Twist Forging, Big Block Chevy 4.250" Stroke 454 Main, 2.200 Rod Journal, W/ Center Counter Weights, Bobweight 2350 grams, Weight 74-76lbs

Manley Big Block Chevy 4.250"Stroke 4340 Non-Twist Forged Crankshaft, 454 Main Journal (2.750"), 2.200" Rod Journal, W/ Center Counter Weights, Bobweight 2350 grams, 74-76lbs 190290 Requires Minimum rod length 6.385"

Heat Treated, Stress Relieved, Shot peened, nitrided and 100% magnafluxed

Micro polished large radius journals (narrowed rod bearings required) 

Note: Manley crankshafts are not intended for use with highly boosted roots style cog belt superchargers.