This is the O.S. Max LC4 Long Reach Hot Glow Plug. Designed for use in .12-.15 and .18 size engines used in monster trucks such as the original and newer 2.5 and 3.3 Traxxas T-Maxx trucks. Unlike other O.S. standard plugs, this is a long body glow plug and should NOT be used in O.S. off-road engines, only Traxxas engines and other engines that need a hot, long body glow plug.Features: Like all O.S. Max glow plugs, the LC4 is tough enough to take the heat and provide hassle-free starts and outstanding durability High-performance long reach glow plug suitable for 1/10 scale off-road applications that require constantly varying speed The LC4's longer reach extends coil farther into the engine's combustion chamber improving combustion for better idling and good acceleration throughout the throttle range Compatible with Traxxas's EZ-Start system Hot heat range for fuels with 5%-20% nitro content No idle bar
