MANLEY "PRO SERIES" 4340 Forged Steel Crankshaft [Stroke 3.622" | Minimum Rod Length 6.098" | Main Journal Diameter 2.559" | Bobweight (grams) 1850 | Total Weight (lbs.) 51-53] (GM LT1 & LT4)

Manley Performance "PRO SERIES" crankshafts designed for the small block direct injected LT1 engine ... Manufactured from a premium 4340 steel forging, these cranks feature a stock 3.622" stroke or an increased 4.000" stroke which can turn your 6.2L into 6.8-7.0L depending on your bore. All crankshafts are shipped with a 58 tooth reluctor wheel installed.

• 4340 material forgings
• 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)
• Gun drilled mains and lightened rod journals for weight reduction
• Counterweights fully profiled

The stock timing crank gear may need to be chamfered to clear the larger radius on the snout of the crankshaft

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