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I would do the catch can first. It won't give you any better performance, but if you put in a shiny new TB it will just get gunked up with oil because you're not running a catch can.
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2010 2SS LS3/ Custom painted gunmetal grey with "ghost" silver stripes / Roto-Fab CAI / Skip shift eleminator / Barton short throw shifter / 20% tint / muffler delete / ******** stealth enclosure with JL Audio 8W7 powered by a JL Audio J2 500.1
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