Eagle Forged 4340 Steel Crankshaft 4-Cyl with .125" Fillet Radius

Eagle Forged 4340 Steel Crankshaft — 4-Cyl, .125" Fillet Radius Brand: Eagle Built for high-performance engines, the Eagle forged 4340 steel crankshaft for 4-cylinder applications delivers exceptional strength and durability. Engineered with a non-twist forging and a .125" fillet radius , this crank is optimized for maximum fatigue resistance in demanding racing and high-boost builds. Material: Premium 4340 forged steel for superior tensile strength Fillet Radius: .125" fillet radiuses for improved stress distribution Surface Treatment: Nitrided and micropolished for enhanced wear resistance and reduced friction Precision Forging: Non-twist forging maintains exact geometry under load Installation Note: Requires chamfered/narrowed bearings This crankshaft is ideal for builders seeking a balance of toughness and finished surface quality for high-RPM, high-load environments. Trust Eagle's proven manufacturing for reliability in competition and high-performance street engines.