4 Barrel Billet Aluminum Carburetor Main Body - 4150 Double Pumper [Red] Speedmaster Twin-Carb combine two four-barrel

Speedmaster Twin-Carb combine two four-barrel carburetors to achieve the best balance of drivability

These Speedmaster 8-71 and 6-71 supercharger manifolds are aluminum constructed and suitable for competition or street use

Speedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat-treated to T-6 specs

Speedmaster harmonic balancers are crafted from high-quality steel and feature a tuned elastomer for optimal engine performance

and use lightening holes in all rod throws

4 Barrel Billet Aluminum Carburetor Main Body - 4150 Double Pumper [Red] Speedmaster Twin-Carb combine two four-barrelThis 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.