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MOPAR PERFORMANCEPART NUMBER: 312-P5007251

Forged Crankshaft RB Main Journal Size

Name: Forged Crankshaft RB Main Journal Size
Brand: MOPAR PERFORMANCE
SKU: 312-P5007251
Price: 1274.99 USD
Availability: InStock

^$1,274⁹⁹

Ships on 09/11/2026

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413/426W/440 RB-Engine & 426 Hemi

RB Main Journal Size
3.750" Stroke
Forged 4340 Steel
8-Bolt Rear Flange

Part TypeCrankshaft

BrandMOPAR PERFORMANCE

Package Height9.0

Package Width9.0

Package Length30.0

Weight51.0 PG

Part CategoryPerformance Parts

Crankshaft MaterialForged 4340 steel

Rod Journal Diameter2.375 in (60.3 mm)

Main Journal Diameter2.75 in (69.85 mm)

LightenedNo

QuantitySold individually

Crankshaft Snout StyleStandard

Main Bearings IncludedNo

Engine BalanceInternal

Rod Bearings IncludedNo

Rear Main Seal Style2-piece

Balancer Bolt Thread Size (In.)3/4-16

Requires Narrow BearingsYes

Engine Stroke3.75 in (95.25 mm)

Vendor Part NumberP5007251

Package Qty1

Package TypeEA

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