Sorry to jump in here but i also have a 2011 SS LS3 and was wondering while were on the topic of exhaust, if i plan on staying N/A for now would a 3" exhaust be a dumb choice instead of 2.5"? Or would i be hurting my power because of not running a S/C? Any advice would be great! I do plan on going with a big cam/ heads or a Maggie in a year or so tho...