A buddy is a mechanic and has a customer with the SRT Charger (like mine), a SRT Jeep, a Viper,and just bought the Challenger. He said this guy has to modify them right away. The 09 Challenger had the 6.1 (370ci) 425hp motor pulled and installed a 440ci 640hp motor already. Also had blacked out wheels and a few other mods.......not sure I like it better than stock, but I'd love to run it a couple times!!!!
BTW: My 08 Charger with just a CAI and dyno tune runs high 12's at 110.