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BD01A-7043500-R
5L FB25 06/12-on
AF64-4005BLK
AF553-16-12S
AR911-0002
Callies Magnum Series Forged 4340 Crankshaft for Small Block Chevy CASMJ21A-MG Product:3.750" Stroke, 2.100" Pin, 400 Mains with Big Block Chevy Snout BD01A-7043500-RCallies Magnum Series Forged 4340 Crankshaft for Small Block Chevy3. 750" Stroke, 2. 100" Pin, 400 Mains with Big Block Chevy Snout CASMJ21A MG SMJ21A 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
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