The Double Pumper is designed for use on lightweight vehicles with a manual transmission or an automatic transmission with a high stall and low rear end gears. This allows the power valve to operate as it should, based off intake manifold vacuum.
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Holley 37-485 Carburetor Rebuild Renew Kit Holley 4150 Double Pumper & Others
For Holley 37-485 Carburetor Rebuild Renew Kit Holley 4150 Double Pumper
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