Eagle 4G63 Stroker 100mm Forged 4340 Steel Crankshaft for 6-Bolt DSM, Part Number EAG2439375900A6

Eagle forged 4340 steel Cranks feature a non-twist forging, .125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface and micropolished. Intended for the most demanding applications. Forged 4340 Steel Crank - MITSUBISHI 4G64, 6 BOLT REAR FLANGE. Crankshaft must be balanced to match your specific Rods and pistons. MITSUBISHI 100MM

The Eagle 4G63 Stroker 100mm Crankshaft is engineered for high-performance Mitsubishi and DSM applications that demand increased strength and durability. Manufactured from forged 4340 steel, this crankshaft uses a non-twist forging process and a nitrided surface to withstand demanding operating conditions. The 100mm stroke design supports stroker engine configurations when matched with compatible rods, pistons, and supporting components.

Part Number EAG2439375900A6 features .125-inch fillet radiuses for improved crankshaft strength and durability. Because of the enlarged fillets, chamfered or narrowed connecting rod bearings are required for proper clearance. The journals are micropolished to promote a smooth bearing surface and reliable operation. This crankshaft is designed for Mitsubishi 4G64 applications with a 6-bolt rear flange and is also commonly used in compatible DSM performance builds.

The Eagle 4G63 Stroker 100mm Forged 4340 Steel Crankshaft must be professionally balanced to match the specific connecting rods and pistons used in the engine assembly. Proper balancing, bearing selection, clearance verification, and installation are essential for dependable performance. This automotive crankshaft is intended for serious performance applications and is not supplied as a complete balanced rotating assembly.

Fitment

Compatible applications include select 1990–1992 Mitsubishi Eclipse, 1990–1992 Eagle Talon, and 1990 Plymouth Laser models equipped with compatible DSM engine configurations. Verify engine generation, bolt pattern, rear flange configuration, stroke requirements, and supporting components before installation.

What's Included

One Eagle forged 4340 steel stroker crankshaft. Connecting rods, pistons, bearings, balancing services, and installation hardware are not included.

Key Product Specifications & Technical Data

• Brand: Eagle
• Part Number: EAG2439375900A6
• Application: Mitsubishi 4G64 and compatible DSM performance engines
• Material: Forged 4340 steel
• Stroke: 100mm
• Rear Flange: 6-bolt configuration
• Surface Treatment: Nitrided and micropolished
• Fillet Radius: .125 inch; chamfered or narrowed bearings required

Features:

• Forged 4340 Steel Construction: Provides high strength and durability for demanding high-performance engine applications.
• 100mm Stroker Design: Increases engine displacement potential when paired with compatible rods and pistons.
• Non-Twist Forging: Helps maintain crankshaft integrity and dimensional stability under severe operating conditions.
• Nitrided and Micropolished Journals: Enhances surface hardness and provides a smooth bearing-contact surface for reliable operation.

Fitments:
1990 Eagle Talon TSi
1990 Mitsubishi Eclipse GS
1990 Mitsubishi Eclipse GSX
1990 Plymouth Laser RS
1991 Eagle Talon TSi
1991 Mitsubishi Eclipse GS
1991 Mitsubishi Eclipse GSX
1991 Plymouth Laser RS
1992 Eagle Talon TSi
1992 Mitsubishi Eclipse GS
1992 Mitsubishi Eclipse GSX
1992 Plymouth Laser RS

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1