Aeroflow Forged Crankshaft, 4.000" Stroke, 6.000" Rods, 350 Mains Fits S/B Chev. 2-Piece Rear Main Seal

Engineered for street or race engines pushing well beyond factory power limits, Aeroflow Performance forged crankshafts deliver ultimate strength and exceptional value. Each crank is manufactured by compressing a solid billet of certified, high-strength 4340 steel under extreme pressure. This forging process aligns the metal's internal grain structure, significantly increasing structural integrity and resistance to stress. For long-term durability, every crankshaft undergoes a precision deep-case nitriding process for maximum surface hardness, finished with a final grind to ensure perfect balance down the track.