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The Manley Pro Series 4340 alloy steel crankshaft is a high-strength replacement for domestic V8 applications, built from a non-twist forging to preserve durability under load. Each crankshaft receives stress relief, shot peening, 100% magnaflux inspection and multi-step heat treatment including nitriding. Micro-polished journals and quality checks ensure reduced friction and long service life.
Manley Chevrolet Big Block 4340 Non-Twist Forgings 4.250in Stroke Crankshaft
