Hangar 9's Four-Cycle Super Plug features a heavy-duty .008" platinum alloy element and extended "hose nose" tip that extends into the combustion chamber, isolating the element from the cool air/fuel mixture. HANGER 9's R&D staff have been using the new Hangar 9 Plug in several four-cycle applications, including inverted mounted Saito .91s, multi-cylinders, and two Saito 1.80s. They've done direct comparisons with the leading four-cycle plug and found that in all applications, the Hangar 9 gave equal idle and transition performance. And with over 35 test flights to date, they're sold on the reliability and performance and the ability to stay lit under tough conditions. Keep the heat on with Hangar 9's Four-Cycle Super Plug.