![4 Barrel Billet Aluminum Carburetor Main Body - 4150 Double Pumper [Red] 6 pinion gear](https://cdn.shopify.com/s/files/1/0762/0316/3867/files/PCE116.1006_c4de780a-68a1-4d9a-8e6d-2e70c7baf7cf.jpg?v=1784710729)
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6 pinion gear
They are heat-treated prior to thread rolling and machining and are rated at a whopping 190
5" axle features an 8
Silicon aluminum is the choice for many of today's engine manufacturers because of its high fatigue strength and superior temperature threshold
An engine with a 4340 billet steel crankshaft will rev faster and cleaner due to the different harmonics produced from the high grade material
4 Barrel Billet Aluminum Carburetor Main Body - 4150 Double Pumper [Red] 6 pinion gearThis 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.
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