These high volume, high performance petcocks are manufactured in the USA by Pingel. The unique design maximizes fuel flow on both main and reserve making the Power-Flo petcock unequalled in fuel flow by any other petcock manufactured for a motorcycle. All petcocks are available with an easy twist lever and offer more reserve than stock gas valves. These Power-Flo petcocks feature a polished aluminum or chrome plated brass body of 1 1/8" hex with a total length from bottom of the threads to the bottom of the valves of only 1 1/4". This ultra compact size permits their installation in even the tightest clearances. The machine cut 3/8" NPT threads of the valve body fits stock gas tanks thru 1974 as well as most aftermarket custom tanks. The optional adapter nut permits installation on the 1975 to present original equipment, Zodiac and most other aftermarket gas tanks. High quality o-rings insure leak proof seal. Stainless steel components with stainless steel fuel screen are included. The dual outlet version can be used for Nitrous Oxide systems (one outlet for carburetor/fuel pump feed and the other as a fuel return from the fuel pump).