Hi,

As per my sig I own a Firestorm and Hellfire. The stock engines come with HPI R4/R5 glow plugs which are short. But I know loads of people are running long plugs, such as the Mccoy MC9 cold plug. I'm looking for a cold plug to run in mine, should I just get the HPI ones?

Is there a problem with running long plugs in place of short ones? I would expect it would increase compression in the engine? I'm looking for a good cold plug to run in both my engines, I'm running 25% Tornado fuel, so any recommendations would be great.