I'll do my best of condensing everything I know about the Bullitt and what you guys have said. The engine was rated at 265hp at first, but Ford then revised their official rating to 275hp.
Engine
-Bullitt Aluminum Intake
-Cobra twin 57mm throttle body
-Higher Voltage but smaller alternator
-Special underdrive pulleys
-Special Alvin exhaust flowing 20% better than stock GT
Suspension
-3/4 inch lowered
suspension
-Subframe connectors
-Tomiko (spelling) Racing shocks and struts
-Cobra Front sway bar
-V6 rear spay bar
Brakes
-Cobra brakes front and back painted Ford Cardinal red
Body (Only available in Green, Black, Blue)
-Spoiler Delete
-17x8 Bullitt wheels
-Rolled tips
-Bullitt Badging
-Fog Light Delete
-Unique Side Scoops
-Special lower body panels (found on 03 cobra also)
-Unique C pillar
-Brushed aluminum gas door
Interior (Only available with Charcoal interior)
-Special Retro Gauges
-Cobra Seats recovered with special leather to look like 1968 seats
-Bullitt brushed aluminum shift noob
-Bullitt brushed aluminum shift ring
-Brushed aluminum lock posts
-Bullitt chrome pedals
**Also comes with 2 stickers that tell what number Bullitt it is and there is a third sticker that Ford keeps in its possession.
Thats all I can recall for now, and I'm pretty sure thats it.