Eagle 2034655900B7 Forged 4340 Crankshaft for 1993-06 Mitsubishi/Evolution-Talon

Vehicle Fitment

• 1993-1998 Eagle Talon (All trims, 4G63, 7-bolt rear flange)
• 1993-1999 Mitsubishi Eclipse (GS / GST / GSX / Spyder GST, 4G63, 7-bolt)
• 1993-1994 Plymouth Laser RS (4G63, 7-bolt)
• 2003-2006 Mitsubishi Lancer Evolution / Evo MR / Evo RS / Evo SE (4G63T, 7-bolt)

Fitment Notes

• Rear flange: 7-bolt pattern (not compatible with 6-bolt rear flange setups)
• Designed for internal balance configurations only
• Requires chamfered / narrowed bearings due to journal radii
• Stock stroke (88 mm); non-stroker variant (94 mm stroker exists separately)
• Street legality may vary; product marketed for performance / race applications
• Fitment confirmed through 2006; 2007+ unconfirmed

Features

• Forged 4340 steel construction for enhanced fatigue strength and durability 
• Non-twist forging plus shot-peened and stress-relieved to reduce internal stress 
• Nitrided surfaces and micropolished journals (<5 RA) for smooth bearing surfaces
• .125" fillet radii on rod and main journals to reduce stress risers 
• Cross-drilled / chamfered oil holes for improved lubrication
• Internal balance type to match OEM balance without external weights 
• Requires balancing to rod & piston mass; target bobweight tolerance is tight (~±2%) 
• Rated for high power builds; often used in motors pushing beyond stock limits

Specifications

• Material: Forged SAE 4340 steel 
• Stroke: 3.465 in (≈ 88.01 mm) - stock stroke for 4G63 7-bolt engines 
• Main journal diameter: 2.244 in (≈ 56.998 mm) 
• Rod journal diameter: 1.771 in (≈ 45.0 mm) 
• Rod journal width: 1.05 in 
• Weight: ~37 lb (≈16.78 kg) 
• Rear main seal style: 1-piece seal
• Balance: internal with machined center counterweights for OEM balance match 

Included Components

• 1x Eagle 2034655900B7 Forged 4340 Steel Crankshaft

Product Description

The Eagle 2034655900B7 crankshaft is a high-quality forged 4340 steel component built for the 7-bolt flange version of the 4G63 engine - common to later DSMs (Eclipse, Talon), Plymouth Laser, and Mitsubishi Evolution models. With its stock stroke of 88 mm (3.465 in), it maintains factory displacement, making it ideal for rebuilds that preserve ECU calibration while boosting strength in the bottom end. The internal balance design helps simplify installations by avoiding the need for external balancing weights and keeps fitment close to OEM styling and housings.

Manufactured with precision: non-twist forging, shot-peening, detailed surface treatments (nitriding, micropolishing), and generous fillet radii enhance strength under high RPMs and torque loads. Users should ensure matching rod & piston assemblies are balanced to this crank's specifications - narrow/chamfered bearings are required. This crank is suited for performance builds where reliability matters, such as turbocharged 4G63T setups, street/strip builds, or motorsport applications. Fitment confirmed through 2006; 2007+ years are unverified with this part.