Holley Pro Series Double Pumper Carburetor Secondary Linkage Kit # HO20-122

Throttle Linkage, Secondary, Natural, Steel, Holley, 4500/4500 HP/4150/4150 HP, Kit

Holley Pro Series secondary linkage kits will provide a bulletproof method of adjusting secondaries on all double pumper, HP, and Ultra HP Holley carburetors. You can choose between a 1:1 ratio and progressive secondary linkage operation. Their unique design provides infinite adjustment of the carburetor's secondary throttle blades, which makes for easier tuning decisions