Mikey97z,
Is there any chance you actually have clips of driving down the highway at around 75??
I know that city driving, the GMMG is great, and thats what your clips demonstrated... I am wondering about the highway...


Back to my previous question... Will dynamatting the rear area help cut down the drone??

 

Well, as an owner of GMMG I am partial to it, of course. I have heard many others in person and definitely like the tone of GMMG the best. I have heard clips of Dynomouth on here from Ratio411 and it sounds pretty good.

My84Z speaks of my car in this tread. I have the GMMG cat back with the oval tips (which look bada$$ on the T/A) I also have FLP LT's (damn nice headers I might add) this combination is very toned and sounds great. Nice quiet rumble at idle, nice moderate toned rumble at cruise and at WOT holy hell its probably the best tuned exhaust out there for the LS1, thats with the cats in.

I took the cats out and replaced them with the race pipes from FLP, and the sound becomes less tuned/toned and is absolutely loud as f**k. Its like running a cutout right after the headers. This makes for a drone inside the car whereas with just the cat there's practically none and even with the LT's there's minimal resonance.

I say if you have the money and don't mind spending it, go with GMMG. Want to save a few then go dynomouth getting also a good sound from what read and hear. Good luck with your decision.

 

The GMMG was always way to loud for my taste and waay to obnoxious, but it is the nastiest sounding exhaust I have heard for an LS1. I would personally get a Hooker or a Mangaflow due to money issues and the sound. I had a Hooker on my LT1 and it had a very throaty sound. Great sound above 2000 but not much of a difference at idle. I would get Corsa if I had an unlimited budget (my uncle has one on his A4 vette)

Todd