I had a DMH cutout, and after going through several (under warranty), I ended up with a QTP.
It is a 3" (at least it fit my 3" cutout - I got it free for promoting QTP on a different message board), and was awesome. I stopped using it after I swapped to 3" true duals, as the car is too loud without bypassing the "mufflers." I'd have to dig it out of the basement, but I am sure I still have it, am willing to sell it. Not sure if I still have the switch or not, and it is just the unit, not the weld-in part of the cutout. PM me if interested.