I liked my SLP LM's a lot with everything else being stock.

 

I like my Pypes Violaters with Pypes LT's, off-road xpipe with Magnaflow cats,

http://www.youtube.com/watch?v=E0Sqb...=youtube_gdata

 

Nice, mine was louder before the I put the m80s in. This was LT's, H, and Mac's.

http://www.youtube.com/watch?v=tVKKUgec3Zc

Same PLUS m80s.

http://www.youtube.com/watch?v=11qQSREDbS4

 

I had the Pypes Violators put on my 06 GT about 3 weeks ago. I was not impressed with the sound for the first week but now I want to spend a lot of time in the stang because they sound so good. Very deep, no drone. They guy at the muffler shop said he had to bend the hangers a little to get them to hang straight but otherwise not bad. It took him about 30 minutes.