Manley Chrysler 5.7L/6.4L Hemi 4.050in Stroke 4340 Forged Crankshaft w/ 58 Tooth Reluctor Wheel

Manley Performance “PRO SERIES” stroker crankshaft designed for the Gen III small block HEMI engine. 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/6.4L 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. Counterweights are profiled for 6.125" connecting rods. Stroke: 4.050 in. - Rod Journal: 2.000 in. - Reluctor Wheel: 58 Tooth - Bobweight: 1730 grams When installing these crankshafts in a VVT engine, you also need to order a crankshaft gear spacer part number 42000 - All 2013 and later 58 tooth reluctor wheels have a tooth width of .130”, along with a dimple in the rear face of the wheel - All reluctor wheels are attached with 4 fasteners

• Multi-step heat treatment process and nitrided for added strength to already strong forged 4340 material
• Micro polished large radius journals (narrow rod bearings required)
• Gun drilled mains and lightened rod journals for weight reduction
• Stress relieved, shot-peened and 100% magnafluxed
• Dual keyed post for supercharger drive pulleys
• Counterweights fully profiled

The Manley Performance PRO SERIES Chrysler Hemi crankshaft is engineered for high-performance small block engines, offering a robust construction from premium 4340 steel forging. With a 4.050-inch stroke, this crankshaft allows enthusiasts to increase engine displacement from 5.7L to approximately 392 cubic inches and from 6.1L/6.4L to about 426 cubic inches, unlocking significant power potential. The design incorporates small journal (2.000-inch diameter) crank pins, providing taller side walls on the crankshaft rod journals for improved oil control and reduced windage, which contributes to enhanced engine efficiency and durability. The crank is profiled for 6.125-inch connecting rods and features a 58-tooth reluctor wheel, making it compatible with modern VVT engines when used with a spacer part number 42000. All reluctor wheels have a tooth width of .130 inches, with a dimple on the rear face for proper alignment, secured with four fasteners for secure attachment. These crankshafts undergo a multi-step heat treatment process and nitriding, which significantly enhances strength and wear resistance of the forged 4340 material. Micro-polished large radius journals ensure smooth operation, while gun drilling mains and lightened rod journals reduce overall weight, contributing to improved engine responsiveness. The crankshaft is stress-relieved, shot-peened, and undergoes 100% magnaflux inspection to ensure integrity and reliability. Dual keyed posts allow for easy installation of supercharger drive pulleys, and fully profiled counterweights optimize balance and performance. This product is designed for racing or high-performance street applications, offering the durability and precise engineering needed for demanding engines. Suitable for use in engines with VVT and compatible with existing aftermarket components, the Manley 4340 forged crankshaft is a trusted choice for serious builders aiming to maximize their engine's potential.

Features:

• Made from premium 4340 steel forging for strength and durability

• 4.050-inch stroke allows increased displacement from 5.7L to 392 c.i. and 6.1L/6.4L to 426 c.i.

• Small journal (2.000-inch) crank pins for better oil control and reduced windage

• Micro polished large radius journals for smooth operation (requires narrow rod bearings)

• Gun drilled mains and lightened rod journals for weight reduction

• Multi-step heat treatment and nitriding for enhanced wear resistance

• Stress relieved, shot-peened, and 100% magnaflux inspected for quality assurance

• Includes a 58-tooth reluctor wheel with .130-inch tooth width and rear dimple for VVT compatibility

• Dual keyed post for supercharger drive pulleys

• Fully profiled counterweights for optimized balance