Ford Mustang Forum - View Single Post - Which Long Tube Headers with FM Outlaw Axel Backs
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post #22 of (permalink) Old 03-20-2016
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Blazin72's Avatar
Joined: Sep 2010
Location: Union
Posts: 3,543
Originally Posted by Lava12 View Post
You have the same setup is what I have now? How long have you had the GT500 mufflers? Did they get deeper over time?
I've had them since summer 2013. I installed the headers in December of that year then changed to the catted mid pipe in March.

The only time I noticed a change in muffler tone was when I installed the headers or changed the mid pipe. I actually did not like the GT500s behind the factory exhaust. I thought they sounded too blatty. The off-road pipe just made it too loud. The catted pipe took the edge off but they still get plenty loud when I open it up.
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