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Manley Pro Series 4340 alloy steel forged crankshaft for Chevrolet Big Block 454 applications uses a 4340 non-twist forging and multi-step heat treatment with nitriding for increased strength and longevity. Each crank receives stress relief, shot peening and 100% magnaflux inspection; journals are micro-polished and large-radius to reduce friction. This crank is aimed at high-performance domestic engine builds needing durable, precision components.
Manley Chevrolet Big Block 454 Non-Twist Forgings 4.250in Stroke Crankshaft
