cody91mustanglx

i just bought a american thunder exaust system, is the delta flow muffler going to increase power and is the sound goin to be loud , it says in reviews minimal interior noises?

91hatchgt

It depends on your headers, and midpipe as well. I had a set of shorty BBK headers, O/R H-pipe, and the american thunder system, and it was LOUD! My buddy had the same headers, but an X-pipe, and it wasn't as loud..

Bottom line is, if you have cats it won't be so loud, if you have any O/R midpipe, it's going to make some noise! Resonance in the interior was around 2k rpm in my old 91 but I didn't mind it because it sounded sweeeeeeeeeeeeeettttt.

Ryan5.0

Let us know if you run into any quality or fitment issues.

FivePointOhh

i have fitment issues with my american thunders cat back system. the driver side tailpipe doesnt come straight out, it sits all cockeyed. its coming out where the corner of my bumper is where the other tailpipe is PERFECT. lines up nicely and everything.