Hangar 9 offers this Four-Cycle Plug that equals the performance of the leading plug, but at a fraction of the price. 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. Hangar 9's R&D staff have used the plug in several four-cycle applications, including inverted mounted Saito .91s, multi-cylinders, and two Saito 1.80s. Direct comparisons with the leading four-cycle plug found that in all applications, the Hangar 9 gave equal idle and transition performance. Keep the heat on with Hangar 9's Four-Cycle Super Plug.