GMMG!!!
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But anyone with a stock-converted A4 or manual transmission car will get a lot of rasp through the GMMG without cats. But that includes just about every other aftermarket cat-back available for our cars. LS1's just get very raspy/tinny without cats regardless of the "single" exhaust system being used(some just sound worse than others).
I've heard the GMMG both ways, and I personally think it sounds MUCH better with the cats in place.

Mike



I thought that would be more raspy than a muffler... I have been looking for something with a deeper tone. Does it have a deep tone??