Callies Magnum Crankshaft - SB Chevy - 3.875" Stroke - 2.100" Pin - 350 Main 2.448" Helmet Forced Air Rocker Switch Designed for fast driver changes

Designed for fast driver changes and to break away in the event of a hot extract

Made of durable TPO material that protects the areas that are exposed when the flare is removedVehicle Applications: 2018-2021 Jeep Wrangler Rubicon

maintenence free lifespan

1988-1990 Chevrolet K3500All GM TH400 automatic transmissions

1970-1981 Chevrolet Monte Carlo

Callies Magnum Crankshaft - SB Chevy - 3.875" Stroke - 2.100" Pin - 350 Main 2.448" Helmet Forced Air Rocker Switch Designed for fast driver changesA 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