I’m not a tuner. Email will@overkill. But the point of a tune is that your adding upgrades or mods that the stock tune is not written for. I added mods before I even got a tune. But you can always email will with a new exhaust and he’ll retune. But if you just search through camaro5 will give you some good info. I even gave him my different tire diameter as you would with a different rearend gear ratio. It all plays a factor so it’s nice that he’s always willing to retune for you.
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