Well, I don't have that set-up but my cousin does. Personally, the combination sounds like butt.
It makes his car so freaking loud and abnoxious. It's raspy, poppy, ear pearcing loud but, on his car perhaps, it's just that much worse because he has hardly any 'go' mods and mostly show. So, when he punches it, his car goes no where but makes an ass load of noise. Sorta reminscent of the older chevy's Hell, even under nomal driving his car is at times louder than mine under full throttle.
I have a ProChamber + 2 Chamber flows. I used to have Spintech ProStreets, but those were a bit too loud and attracted a bit too many cops in my area.
Why didn't you just go to the quieter Spintech Sportsmans? I like the way Spintechs sound. Can't wait to get my Magnaflow CB on; I'm getting just a tad tired of my 2-chambers...don't get me wrong they still sound nice but I want a different tone. If I don't like the Magnaflows I think I'm gonna go with some Sportsmans.
I have spintech pro streets and a prochamber and it sounds absolutely awesome. I have been down the h pipe and flows and the x pipe and flows but got tired of the flowmaster sound. Everyone has them and that is expected of a mustang. The spintechs sound different but not in a bad way whatsoever. Dont' get me wrong, I love the way flows sound but these spintechs keep putting a smile on my face whenever I get in my car now. I vote for spintechs for everyone in doubt. I wish I had a soundclip. My car sounds nothing like the clips on www.mustangexhaust.com They are pretty loud though, when I go to long tubes I might put a catted midpipe on. I couldn't imagine these things with an off road H pipe.