Callies Magnum Crankshaft - SB Chevy - 3.500" Stroke - 2.000" Pin - 350 Main 2.448" YA0815 Stackable shims index spark plugs

Stackable shims index spark plugs at 30° intervals up to 360°

Extended back heatshield panel across shoulder area for added protection

Ultimate DL tachometers still come packed with features

Features: Reverse Stitched for better more comfortable feel

Free air calibration not required

Callies Magnum Crankshaft - SB Chevy - 3.500" Stroke - 2.000" Pin - 350 Main 2.448" YA0815 Stackable shims index spark plugsA 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