Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededMOPAR PERFORMANCEPART NUMBER: 312-P5007255
Forged Crankshaft 360 "LA" & 5.9L Magnum Main Journal Size
$1,10099
Ships on 11/18/2026
Lowest Price GuaranteeItems You Need
![Break-In/Engine Oil Supplement [12 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28060.jpg)
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
MOPAR PERFORMANCE
Part Number : 312-P4876056AA
$1399
318/340/360 LA (Small Block) & 5.2L / 5.9L Magnum
- Forged Crankshaft
- 360 "LA" & 5.9L Magnum Main Journal Size
- 3.580" Stroke
- Forged 4340 Steel
- 6-Bolt Rear Flange
- High-strength, high-quality forged steel crankshafts machined from 4340 or 4140 steel. For high-performance and race applications.
Part TypeCrankshaft
Product LineMopar Performance Forged Steel Crankshafts
BrandMOPAR PERFORMANCE
Package Height8.0
Package Width8.0
Package Length27.0
Weight56.2 PG
Part CategoryPerformance Parts
Crankshaft MaterialForged 4340 steel
Rod Journal Diameter2.125 in (54 mm)
Main Journal Diameter2.81 in (71.374 mm)
LightenedNo
QuantitySold individually
Crankshaft Snout StyleStandard
Main Bearings IncludedNo
Engine BalanceInternal/External
Rod Bearings IncludedNo
Rear Main Seal Style2-piece
Balancer Bolt Thread Size (In.)3/4-16
Requires Narrow BearingsYes
Engine Stroke3.58 in (90.932 mm)
Vendor Part NumberP5007255
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
