I recently put the GMPP Cat-Back exhaust on my 2010 2LT. Just something for a little sound, really not trying to make the car fast at all, thats what my EVO is for, haha. I lost about 4mpg after the exhaust which I kind of expected a drop, but not this much.

I was going to do the GMPP Intake to try to combat this loss in Fuel Efficiency. I was wondering if these things had to be tuned or flashed with any kind of modifications so the computer can compensate and gain a little bit of my fuel efficiency back.

Keep in mind, I'm not trying to make any kind of power with the car whatsoever. I got it because of the MPG for a nice DD to compliment my fast car.

Thanks,