Butterfly-type carbs with a fully adjustable idle mixture screw and a changeable mid-range and high speed jet. Fully adjustable accelerator pump and a variable enrichment/fast idle device for improved throttle response, engine starting and warm-ups. Super E has a 1 7/8" (47.6mm) throat at the butterfly and a 1 9/16" (39.6mm) venturi and is recommended for use on any displacement Big Twin or Sportster. Tech Note: This is the carb only. It does not come with the Intake manifold, air cleaner assembly, & other required parts for a completer install.This is for custom applications or replacement on bikes that already have an S&S setup. The item "New S&S Super E Shorty Carb Carburetor Harley Big Twin Sportster Chopper Bobber" is in sale since Wednesday, October 15, 2014. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Air Intake & Fuel Delivery\Other Intake & Fuel Systems". The seller is "americanclassicmotors" and is located in Zieglerville, Pennsylvania. This item can be shipped worldwide.