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 2-1/2" (63mm) Billet Aluminium Intercooler

2-1/2" (63mm) Billet Aluminium Intercooler ClampPurple Finish

570 Series PTFE 30° Hose End -16ANSilver Finish

64-2024BLK

000 psi tensile strength

before ordering

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 2-1/2" (63mm) Billet Aluminium IntercoolerCallies 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