Callies Magnum Crankshaft - SB Chevy - 4.000" Stroke - 2.100" Pin - 400 Main 2.648" BR20031 CNC machined 356 aluminum casting

CNC machined 356 aluminum casting

Includes mount for stock headlight switch

1975-1987 Chevrolet P30

2009 Jeep Wrangler Rubicon

but is now used throughout the motorsports industry

Callies Magnum Crankshaft - SB Chevy - 4.000" Stroke - 2.100" Pin - 400 Main 2.648" BR20031 CNC machined 356 aluminum castingA combined effort by Callies CNC programming and engineering staffs has resulted in a component that is distinctive and highly functional. Unique counterweight and rod arm contours produce a lightweight, aero efficient crankshaft. Callies Series II Mangnum Mass Correct counterweights have been placed specifically to reduce bearing loads. By concentrating mass at the point of imbalance, the transfer of rotating and reciprocating assembly weight loads