S&S continues the success story of their Super E and G carbs with a special Black Series edition that was first released for the S&S 55th Anniversary in 2013. These carbs feature a distinctive gloss black Enduraguard coating, which is heat and chemical resistant. In addition to cool cosmetics, they have enlarged venturis for up to 7% more flow.They are not offered as a complete kit, but as a carburetor only. That gives you complete freedom to work these carbs into any custom application. The Super G version with 52 mm venturi is recommended only for racing applications or engines with 1600 ccm and more.