Yeah, I don't know for a fact that they use other brand mufflers, just what I heard. And yes, the catted MRT H-pipe is a high quality piece. It is one of the best catted midpipes available.

 

I called them up one day because I heard they used IMCO mufflers. Well when I talked to the guy there, he said they use their own mufflers. I think they use Magnaflows for one of the series they sell and specifically mention that.

MRT catted h + MRT Max Thunder catback
http://youtube.com/watch?v=RVhzwr1ymL8
http://youtube.com/watch?v=iRyNpRcG7...eature=related