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ARP's specially alloyed stainless steel bolts and heat-treated 8740 chrome moly bolts with black oxide finish are nominally rated at 180
480" Stroke Forged 5
AF137-04BLK
Not running wiper arms
12-Point Head S/S 612-2750 AR612-2750 5/16" UNC x 2
Callies Magnum Series Forged 4340 Crankshaft for Small Block Chevy CASMJ11A-MG Product:3.750" Stroke, 2.100" Pin, 350 Mains with Big Block Chevy Snout ARP's specially alloyed stainless steelCallies Magnum Series Forged 4340 Crankshaft for Small Block Chevy3. 750" Stroke, 2. 100" Pin, 350 Mains with Big Block Chevy Snout CASMJ11A MG SMJ11A 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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