This is the RP8 Cold Glow Plug from OS Engines for use on Most Turbo Head Racing Engines.
FEATURES: For use with fuel containing 25% or greater nitromethane content Cold heat rating when outside...
This is the O.S. T-Series RP7 Cold Heat Range Turbo Glow Plug.
FEATURES: T-series glow plugs are ideal for racing car engines that create high RPM For .12, .15 and .21 size turbo head on-road racing...
Cold, Standard Long plugs especially designed for pattern flying, ducted fan engines or any application where you're using 25% or higher nitro fuel. This is their Racing plug Without an idle bar...
FEATURES: Designed for high nitro fuels. (25% +) Increased durability at high RPM. Durability under extreme temperatures. Allows for leaner needle settings for higher power and quicker throttle...