Fire up a fourth-gen Ford Mustang GT and you'll hear one of two distinctly different V8 soundtracks, depending on when it rolled off the assembly line. From 1994 through 1995, that rumble came from ...

Cutting-edge engines like this don't happen without plenty of help. John Tymensky would like to thank all those inside Ford and Roush who've helped with information and parts. Ain't no replacement for ...