Manley Chevrolet LT1 Directed Injected 4340 Forged 3.622in Stroke Pro Series Crankshaft

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 (Not Balanced/Non-Drilled)
When installing these crankshafts in a VVT engine, you also need to order a crankshaft gear spacer part number 42000 – Crank is NOT balanced and has non-drilled counterweights – 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

For High Horsepower/High Boosted Applications, explore our fully machined “Turbo Tuff Series” billet cranks, available for Mitsubishi 4G63/4G64 and Subaru EJ20/EJ25 engines.

• Lightweight Design, 4340 Billet Material: Manufactured from 4340 Turbo-Tuff Billet material, ensuring durability and performance. Counterweights are fully knife edged to ensure precise balance and stability.
• Increase Displacement with a Stroker Crankshaft: Featuring an increased 94mm stroke provides a 9.3% increase over the stock stroke offering more displacement and more power.
• Rigorous Quality Assurance: Each crankshaft undergoes stress relief, shot peening, and 100% magnafluxing to meet our stringent quality standards.
• Enhanced Strength: A multi-step heat treatment process and nitriding enhance the crankshafts’ strength and longevity.