Originally Posted by CRFXXXT

So what is the verdict on glow plugs? I just ordered a GRP .21 only to find out that GRP plugs are no where to be found (in stock)... Will the Mugen plugs work? IM guessing so as
the motors are close to identical, but at 11 dollars a plug, I don't want to order a bunch and find out that the MR plugs are a no go?