Eagle Specialty Products 440038756000 4340 Forged Steel Crankshaft Chevy 400 3.875" Stroke

The Eagle Specialty Products 440038756000 is a high-performance forged 4340 steel crankshaft engineered specifically for Chevy 400 small block engines. Featuring a 3.875-inch stroke, this crankshaft is designed for builders seeking increased displacement and durability in demanding performance applications.

Key Features:

• Forged from premium 4340 steel for superior strength and fatigue resistance
• 3.875-inch stroke increases displacement for enhanced torque and horsepower
• Precision-machined journals ensure optimal bearing clearances and reduced friction
• Micropolished fillets reduce stress concentrations and extend service life
• Nitrided surface treatment for increased wear resistance and durability
• Lightened and balanced for reduced rotating mass and improved engine response
• Manufactured to strict tolerances for direct fitment in Chevy 400 blocks

Eagle crankshafts are engineered using advanced manufacturing techniques and continuous metallurgical improvements, making them a trusted choice for engine builders, racers, and performance enthusiasts. This crankshaft provides the foundation for reliable high-performance engine builds where strength and precision are critical.