Tune now or later?
You don't need a tune for the mods you have done but if the car is on a stock tune they can maybe squeeze out some performance anyway, especially with it being an automatic.
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1 7/8" and wait for the tune as mentioned above.
i will now finally have my mods complete
lid, bellow, headers, true duels, ls6 intake. and i don't regret it at all,
only thing i regret is beating on it "pretune"

