Eagle Chevrolet 400 3.480-Inch Stroke Internal-Balance Forged 4340 Steel Crankshaft

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 - Chevrolet 400, 3.480" Stroke, INTERNAL BALANCE. Crankshaft must be balanced to match your specific Rods and pistons. CHEVY 400

The Eagle EAG440034805700 forged 4340 steel crankshaft is engineered for Chevrolet 400 small-block applications requiring dependable strength and durability. Its non-twist forging process creates a robust foundation for high-performance and demanding engine builds, while the nitrided surface helps improve resistance to wear. The crankshaft is also micropolished to promote smooth journal operation and long-term reliability.

This Chevrolet 400 crankshaft features a 3.480-inch stroke and an internal-balance configuration. Its .125-inch fillet radiuses improve crankshaft strength, but they require the use of chamfered or narrowed rod bearings for proper clearance. Before installation, the crankshaft must be balanced to match the specific connecting rods and pistons used in the engine assembly. Proper balancing and component compatibility are essential for smooth operation and dependable performance.

Key Product Specifications and Technical Data

• Brand: Eagle
• Part Number: EAG440034805700
• Application: Chevrolet 400 small-block engine
• Material: Forged 4340 steel
• Stroke: 3.480 inches
• Balance Type: Internal balance
• Fillet Radius: .125 inch
• Surface Treatment: Nitrided and micropolished

What's Included

One Eagle forged 4340 steel crankshaft for Chevrolet 400 applications. Connecting rods, pistons, bearings, balancing services, and installation hardware are not included.

Fitment: Designed for Chevrolet 400 applications. Verify engine configuration, bearing requirements, rod and piston compatibility, and balancing specifications before purchase and installation. This product is intended for automotive performance use and may require professional machine work for final assembly.

Features:

• Forged 4340 Steel: Provides a strong, durable crankshaft foundation for demanding Chevrolet 400 engine applications.
• Non-Twist Forging: Helps maintain structural integrity and reliable crankshaft performance under high engine loads.
• Nitrided Surface: Improves surface hardness and resistance to wear for enhanced durability.
• Micropolished Journals: Promotes smooth bearing operation and supports consistent long-term performance.

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