A great quality medium to cold heat glow plug from Enya. A very useful plug for hot engines and engines using higher nitro contents. Are you blowing plugs regular ? If so try this plug.
Glow plugs are considered to be consumables - But by using a low voltage to start ( under 1.5 volts) and not burning the plug dry, you prolong the life of your glow plug. It is also worth washing out a new engine after running in to prevent small particles shorting the plug and destroying it. Blowing plugs on new engines is less common now a days, but is still something that can happen.