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Friend Asking For Advice On His '07 5.3...

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He's got an '07 or '08 2wd with 31-33" tires and 3.23 or 3.42 gears, not sure which ones, but I know they're too low for it. He was thinking about throttle body spacer and a cold air intake, I told him it would help him much at least not without a tune. I'm not totally sure how much he is looking to spend, but I would either say 3.73 or 4.10 gears with a tune, or just cold air intake and headers with a tune, or best yet all of them. What would you think?

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He was already thinking 4.10s and a tune, but $750 for the different gears so he might wait. I think that truck really needs some different gears, but I guess a tune and CAI would do good for now already and then later add headers and 4.10s.

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