You dont have to take off your front bumper, it does make it easyer (so people say) but you dont have to do that or jack up your car, just turn your wheels all the way to the right. Also Kev, you must have done somthing wrong, or you shift before 3500, cuz mine is notacably louder past 3000 rpm, and up near 5000, it ROARS, so yeah, i imation it sounds close tot he same with the res off as it will with your cold air, but plan on the cold air being a little louder. (dont know from experiance, dont have a cold air yet)