Well suited for standard to demanding high performance applications. These very well developed carburetors are depndable; easy to install; tune and give the best leg room. Designed to give you years of hassle free riding fun due to the unmatched simplicity and great fit. Each carb kit includes a S&S carburetor; teardrop air cleaner assembly; manifold; mounting hardware; fuel line and clamps; an extra intermediate jet; two main jets; and a complete installation and tuning booklet. The Super E carb has a 1-7/8" throat and is recommended for use on any displacement H-D Big Twin or XL Sportster engine; regardless of the performance modifications. This includes both stock and high performance engines.