Eagle 4G63 88mm Stock Stroke Forged 4340 Steel Crankshaft, 6-Bolt Rear Flange - 2034655900A6

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 4G63, 6 BOLT REAR FLANGE. Crankshaft must be balanced to match your specific Rods and pistons. MITSUBISHI 88MM

The Eagle 2034655900A6 crankshaft is a stock-stroke 88mm forged 4340 steel crank designed for Mitsubishi 4G63 engines with a 6-bolt rear flange. Built for demanding performance applications, it combines a strong non-twist forging with a nitrided surface and micropolished journals for durability, wear resistance, and dependable operation under high engine loads.

This Eagle crankshaft features .125-inch fillet radii to improve strength and fatigue resistance. Because of the enlarged fillet design, chamfered or narrowed connecting rod bearings are required for proper clearance. The crankshaft must be professionally balanced to match the specific connecting rods and pistons used in the engine assembly. It is intended for automotive applications and is not approved for use on pollution-controlled street vehicles where applicable.

Fitment includes select 1990-1992 Mitsubishi Eclipse models, 1990-1992 Eagle Talon models, and the 1990 Plymouth Laser equipped with the compatible 4G63 engine and 6-bolt configuration. Always verify engine generation, rear flange style, bearing requirements, and rotating assembly specifications before installation. Professional machining, balancing, and assembly are recommended to ensure correct clearances and reliable performance.

What's Included: One Eagle forged 4340 steel 4G63 crankshaft.

Key Specifications: Brand: Eagle; Part Number: 2034655900A6; Engine Application: Mitsubishi 4G63; Stroke: 88mm; Material: Forged 4340 steel; Rear Flange: 6-bolt; Fillet Radius: .125 inch; Surface Treatment: Nitrided and micropolished.

Features:

• Forged 4340 Steel: Provides high strength and durability for demanding performance and racing applications.
• Non-Twist Forging: Helps maintain crankshaft integrity under high load and high-RPM operating conditions.
• Nitrided and Micropolished Surface: Improves journal wear resistance and promotes a smooth bearing surface.
• .125-Inch Fillet Radii: Enhances crankshaft strength while requiring chamfered or narrowed bearings for proper clearance.

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