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High-quality forged steel
64-2010BLK
Like the OEM fuel rails
Steel Speedometer Bullet Housing
Callies Magnum Series Forged 4340 Crankshaft for Small Block Chevy CASAO21A-MG Product:4.000" Stroke, 2.100" Pin, 400 Mains High-quality forged steelCallies Magnum Series Forged 4340 Crankshaft for Small Block Chevy4. 000" Stroke, 2. 100" Pin, 400 Mains CASAO21A MG SAO21A MG After years of service, Magnum crankshafts by Callies have established themselves as one of the most durable competition crankshafts ever produced. Magnum crankshafts are manufactured from ultra pure SAE 4340 steel. Callies then subjects this material to multiple heat treatments, resulting in a crankshaft with unsurpassed wear
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