yell03

I am just about to pull the trigger on a Axle back exhaust for my C7 Automatic non-NPP.

I have been hearing people having issues with codes after installing aftermarket exhausts on their non-NPPs.

Are they not hooking up the AFM valves or is it another issue?

I don't want to waste time and money only to have to go back to stock.

yell03

I put in a call to Flowmaster, I will post up what they have to say.

SCorvette08

with any exhaust aftermarket you should get a tune the tuners are good and they know what there doing shouldnt be no more than 300 bucks

yell03

A tune should not be necessary for just the axle-back, it is just for sound.
I will probably end up with a tune, but I want to make sure the exhaust works fine on a stock car.