The Predator is a must, and not just for different tire diameters. You get a lot of really cool features and the canned tunes are ready to go for a mostly stock vehicle. You'll love the increased shift firmness too.
2013 Shelby GT500 - New!
2008 300C SRT8 (Inferno Red) - Sold
DiabloSport Predator (93 Octane Tune), Jet 180* t-stat (JET-10183)
Toyo Proxes 4 --245/45 Front, 275/40 Rear
Option Groups 1 & 2, Power Sunroof, 13 Kicker SRT Speakers
Capitol Raceway, Crofton, MD: 12.861 @ 111.53 mph
75-80 Dragway, Monrovia, MD: 12.905 @ 109 mph