RB TM 323 & Glowplugs.

Of course each manufacturer is going to recommend their own brand if they make their own. However the brand may not always be the easiest to find without ordering over the net. I personaly run Nova plugs in my Nova engines but I order them 6 at a time when I order other stuff. I would suggest seeing what the engine manufacturer recommends (Hot, Medium, Cold...etc) and thread length and finding something comprable at your LHS.

I've been using Traxxas plugs in mine from day one. I found the tip on the RB website, if I remember correctly.