Manufactured from a premium 4340 steel forging, these cranks feature a 4.050" stroke which can turn your 5.7L into a 392 c.i. engine and your 6.1L into a 426 c.i. engine. The Manley 4.050" stroke HEMI crankshaft features small block Chevy small journal (2.000") crank pin diameters and widths. This provides taller "side walls" on the crankshaft rod journals for better oil control and reduced windage. The counterweights are profiled for 6.125" length connecting rods. All crankshafts are shipped with a 32 tooth reluctor wheel installed.
Note: Manley crankshafts are not intended for use with highly boosted roots style cog belt superchargers.
4340 material forging Multi-step heat treatment process and Nitrided for added strength Stress relieved, shot-peened, and 100% magnafluxed Micro polished large radius journals (narrowed rod bearings required) Dual keyed post for supercharger drive pulleys Gun drilled mains and lightened rod journals for weight reduction Counterweights fully profiled
A heavier target Bobweight will allow you to more accurately balance the rotating assembly instead of adding weight to a lighter crankshaft. 1700, 1730 and 1770 weights are available.
