Re: diablo or hypertech
If you have a stock or lightly modified car a mail order tune is just fine. Does Ford dynotune every car from the factory? nope...all the cars coming out of the factory get the same tune because they are set up very similarly.
I would go with SCT, it offers the most features and options.
2007 Shelby GT500 705RWHP/708RWTQ
2000 Mustang 3.8 A4 TT 450RWHP/475RWTQ 10.996@127 17psi stock 3.8
2006 F250 CC 4x4 6.0L 14.3 @ 93
2006 Mustang 4.0 M5 Vortech 13psi 395RWHP/374RWTQ wife's car