Curious On this .
These “Catback” exhaust systems are just that, from the cat back replaced.
why pay all that money to replace GMs OEM piping which is already stainless!
The only gains you Get are from the muffler swap , taking the old muffler out with the flappers and replacing with a high flow muffler no flappers.
essentially that 13 HP gain for $2000 dollars can be had for around 200-300 dollars.
save your money people, replace the muffler you will get the same gains and sound or better lol.
as far as a cold air intake , get S&B , Volant or Cold Air Inductions. They make much better design intakes and filters. Disconnect the negative battery terminal during installation. This resets the ECM so it can re learn the fuel trims .
No need to get GMs “Tune” . Its not a tune.