4 Barrel Billet Aluminum Carburetor Main Body - 4150 Double Pumper [Black] third member cases are made

third member cases are made from heavy-duty nodular iron for maximum strength

This is our top-of-the-line medium profile LowRise+ Series manifold

they won't eat up race-winning horsepower

the blue anodized aluminum construction delivers performance and a show car quality appearance

These Speedmaster head bolt bushing kits allow you to use stock or aftermarket head bolts with Speedmaster or other aftermarket cylinder heads

4 Barrel Billet Aluminum Carburetor Main Body - 4150 Double Pumper [Black] third member cases are madeThis Speedmaster design features tubes instead of discharge nozzles that provide a more consistent fuel flow. Want to upgrade your street carburetor to a high performance race carb but don't have the means to do a complete carb swap? If you can turn a screwdriver, you can get 25 to 50 HP from these Proform main bodies. With no air horn, choke tower, or choke control to restrict airflow, they deliver extra power easily and affordably.