Check the listing for details. Hangar 9 4-Cycle Super Plug HAN3011 Glow Plugs. Condition: New. Listed at 16.98 USD. OverviewSelecting the right glow plug for your four-cycle can make the difference between an engine that runs reliably sweet with perfect tick-over-idle or constant dead sticks. Glow plugs are especially critical in four-cycle because the element is re-energized with heat only every other cycle, and the cool air fuel mixture enters the combustion chamber right next to the plug, trying to extinguish it. So far the O.S. F plug has dominated the four-cycle scene. Hangar 9 is offering a Four-Cycle Plug that equals the performance of the leading plug, but at a fraction of the price.Same performance, smaller price tag 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.