A lil advice, u should read more before u waste your money. All that crap does is change the shift points so that it will seem faster by taking longer to upchange and getting those rpm's up there in the stratosphere. In order to maximize this effect, it helps to use premium gas but honestly the most gain u canget from this is 12-14 measly horsepower. If u wanted to get killed at the gas station u might as well have bought an SRT-8 (which actually requires Premium) and instead of peanuts get an ass kicking 425 pounds of torque.
You want R/t Like power without paying V8 insurance premiums? then wait a lil longer until someone finally gets us a top notch flash or tuner and get your 3.5 stroked and bored (read about the Prowler v6 3.5 that got stroked to a 5.0 and i think there is even a 4.3 for those not willing to put that much strain in our aliminum block) This can give us anywhere from 70-120 more HP atthe wheels. If u really wanna kick some R/t ass in a v6, u can add a supercharger and get about 50-60 more HP out of her. For about 6-8 G's u can have a seriously fast 4 door sedan and surprise a lot of people who think its a one exhaust pipe 3.5 turtle.