Okay so I have a friend that has a stock 2003 Bullitt and I have a 2000 gt what mods would I need to beat his? His is stock as well but I'm adding and exhaust to mine later this week.
Here's a comparison that they have had for years on mach1registry.com at the bottom of the Specs page.In the first, there is no such thing as a 2003 Bullitt--only 2001 and 2008 through IDK. If it is a 2001 Bullitt the only things you would need to blow it off would be an aftermarket 70 mm TB and plenum, and a decent tune.
The only advantage the 2001 Bullitt had had over the GT was a slightly better intake arrangement that pumped the mid-range up a bit, and pushed the peak HP from 260 to 265...