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 Separation. Valve spring upgrade required.
GM-recommended replacement part for your GM vehicle's original factory component. Offering the quality, reliability, and durability of GM OE. Manufactured to GM OE specification for fit, form, and function. Undergo the same stringent testing process as the original part.