Callies Magnum Crankshaft - SB Chevy - 3.750" Stroke - 2.100" Pin - 350 Main 2.448" Control Arm Shims Hex-head and 12-point types are

Hex-head and 12-point types are available

Zamp Z-14 Series replacement helmet shield

1987-1987 Pontiac Firebird

Alodined Aluminum

Red / Black Stripe

Callies Magnum Crankshaft - SB Chevy - 3.750" Stroke - 2.100" Pin - 350 Main 2.448" Control Arm Shims Hex-head and 12-point types areA 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