Ok guy's I'm getting ready to wake up my pony and I need some advice from those that have been here before me. I have bone stock 2015 GT, adding a stage 2 power kit to it in the next month, which consists of cold air intake, long tube headers and cat-back exhaust, programmer and a short throw shifter; I was also looking at swapping the 3:31 gears out for 3:73, but not sure I'd gain that much from this change; and by this time next year I should be sporting a supercharger on it as well. Would you just leave the lower gearing in or bump it up? It's not a daily driver, but I do like to get out and drive on the weekends and have been averaging just over 25 mpg on the highway, would I kill the mpg if I go to the 3:73's? And by how much? Will the smile on my face make up for any MPG loss if I go to the quicker gear set?