Eagle Chevrolet 350 2Pc 3.500in Stroke IMCA Legal Forged 4340 Steel Crankshaft

Eagle is well-known for making strong rotating assembly components for performance engines. This forged 4340 steel crankshaft is built for the demands of the Chevrolet 305 and 350 engines, specifically designed for IMCA RaceSaver racing. It features a 3.500-inch stroke, giving your engine a good balance of displacement and RPM potential.

This crankshaft starts with a non-twist forging of 4340 steel, which is a strong material chosen for its durability under high stress. To further enhance its strength, it's treated with a nitride surface treatment and then micropolished. The fillet radii are .125 inches, which are chamfered, meaning you'll need to use chamfered or narrowed bearings to ensure proper clearance and oil flow. Eagle also specifically mentions that there are no lightening holes in the second or third rod throws, which adds even more solid strength where it counts for racing applications. This crankshaft is IMCA legal, making it a solid choice for competitors in that sanctioning body.

When building or rebuilding a performance Chevrolet engine, especially for racing, the crankshaft is a critical piece. This Eagle crankshaft is built to handle the rigors of the track. Make sure to consult your engine builder or service manual for the correct bearing selection and installation procedures, as the chamfered fillets require specific bearing types.