Super G has a 2-1/16 throat at the butterfly and is recommended for use on 100-cubic-inch or larger Big Twin with performance modifications such as porting, cam change, big bore cylinders and/or stroker flywheels. If there is a doubt as to which carburetor to use, we suggest the 1-7/8 Super E. Each carb kit includes an S&S Super E/G gas carburetor.S&S Super E carburetors require the use of a two-cable, pull open/pull close throttle assembly. Recommended for racing only, this carburetor is not legal for use in California on motor vehicles operated on public highways or in other states where similar pollution laws may apply. User must determine the suitability of the product for his or her use and assumes all risk and liability in connection therewith. Super E not to be used with Magneto Models. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Air Intake & Fuel Delivery\Carburetors & Parts". The seller is "oemcycles" and is located in this country: US. This item can be shipped worldwide.