Find a good muffler shop.. Call up Jegs and get your headers,, if they dont have them in the catalog they will have them online or if you call.. Same with summit.. Anyway,, get some long tube headers, and the power steering drop bracket (like $15 in most mustang magazines) put the headers in yourself and then drive it to a decent muffler shop and set off every car alarm you pass.. Thats what I did.. I went with 2.5" flowmaster 40's all the way out the rear valance. and my muffler guy did the install (mufflers provided by me) for $350 with an H pipe. I like.. But I think that when its time to replace the mufflers I will definately go with something a little quieter.. I have kids (3 and 5) and they cover their ears sometimes when I drive by.. I dont like that..