The first vid is the bullet brand new 2 years ago all made with stock piping from the orginal exhaust and the second one is newer but crappier sound. It was more for the clearance in the garage than sound
The truck is a 06 4.6l
http://www.youtube.com/watch?v=cVIuQ..._order&list=UL
http://www.youtube.com/watch?v=tK9Jbz8utSA