I just recently purchased a 2004 40th Anniv. Mustang GT and I'm starting to think about some mods I'd like to do it. I just installled a K&N Cold Air Kit and i'm starting to look at the exhaust. I was wondering what everyone had to say about the exhausts they have and what they recommend. I was thinking, SLP Loudmouth, Magnaflow, or Flowmasters. I appreciate any feedback

 

Each person likes different sound from their exhaust setups. Id suggest going into the video section of the forum and listen to the posted exhaust clips and see what you like.
I have xcelerator weld in mufflers and I love em. I can really control the sound and they are pretty quiet as far as inside the car, but behind me it really gives a nice sound and rumble. WOT just screams too.

 

I have an 04 GT and I went with magnaflows.

 

I've got Magnapacks and a Magnaflow Tru X pipe and could'nt be happier.MattJ is right you just have to do some research and decide which sound you like.I had Flowmaster single chamber race mufflers welded in before my current setup and it sounded damn good too.

 

If I could do it again, Id consider SLP, but those are damn loud mufflers. I have magnaflows and love the sound, and the "stealthability" of them.