HYDRAULIC - Thumpr : High performance street, stock converter ok, best with 2000 converter and gears. Choppy/thumping idle.279/297 Advertised Duration, 227/241 Duration.050 inch, .479 inch/.465 inch Lift, 107 Lobe SeparationValve spring upgrade required
HYDRAULIC - Thumpr : High performance street, stock converter ok, best with 2000 converter and gears. Choppy/thumping idle.
Brand: Comp Cams, Model: 12-600-4