Best I've seen for all-in-one selection and installation of all kinds of modifications:
CJ's Mustang GT/CS site

 

Yup. It's a good sight. I actually found that sight before I found my way here. I wish he was still blogging though. He just kind of stopped a couple of years ago.

It's funny. When I first found that sight I knew nothing about this stuff. It might as well have been in French. Now it seems like a diary of what I did on mine.

 

I'll be ordering those GT500 splash guards. Their hardely noticible and will keep all that road crap off the rear. My dad is always cleaning it off.

 

Kind of like a site, is it?

 

Perhaps. But only if you see it.

 

You guys know this is rumored to be the Stig's site, right? It could be Hammond's because he does own an older Stang.

 

I think its just a fan of the Stig.

I did look at his links to the Ultimas.
http://www.ultima-gtr.info/

I think this person was/is a member here and his username was stig or something.

 

Here you go,

This is the site (notice I got it rite this time) owner Stig

It's funny. This page is where I found the link to TMS back in 2007.

http://www.mustang-gtcs.info/links.htm

 

Right you are. I think the rumour came from his reference to the Top Gear test track in his mods blog for the Stang.

 

I've done that,,they work great,

 

This was my go to site for mod guides, until TacoBill

 

My little documentation site... enjoy, hope it's helpful:

http://kerrymitchell.net/mustang/index.asp

 

This is a cool video. I have the SLP's on my car, sounds just about right. Although idle is a bit louder on his, due to the headers that Im lacking...should I get them...