Exhaust

[97TahoeLT]

To improve mpg you will need an intake and a tune with your magnaflow.

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[JennaBear]

Exhausts provide little to no performance and MPG increases.

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[jackedupZ71]

i know flowmaster isn't the preferred choice but my wife wanted a little more sound out of her denali so i put a 40 series on it cuz it was cheap and our exhaust shop had it. It actually sounds good and isn't much louder than stock going down the road