Hey Guys & Gals!
I need some output on the GT dual American thunder flowmaster exhaust.
If you kept up with my mod list that I've done, you'll know that I have the Gibson dual exhaust on my ride w/custom X pipe, OK!

I'm not to happy with the sound and performance of this item, so I was thinking about swapping out the Gibson for GT dual flowmaster's AT.

I had a single flowmaster AT on my ride and that was one bad a** sounding and performance muffler. So I'm thinking about going that way again with a GT dual setup. The guy that installed my s/c'er has a pair of FM/AT mufflers for sale, from a GT.

Any PRO/CONS on this item?????
I'm not so much looking for hp, But sound and back pressure.
With the GT dual FM/AT muffler setup, do you think I should do the Y,X or H pipe for my F/I setup?????
Thanks,
Denny

 

Not sure about flowmaster but stock gt mts and ats sound different mts more aggresive

 

I did the FlowMaster AT muffler setup, this week and they sound very good to me.
As I'm typing this post now, I'm getting another custom X pipe made up because the one that I have on my ride now is so ugly that I can't even post a picture of it. And the flow of that X pipe is off and not helping my back pressure.

I just updated my Sig.