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Looking to add Trick Flows upper intake plenum to my list of mods. What kind of hp increase do you think i would see if any? In your opinion, is it worth the $100? Other mods will include full MAC exhaust, pulleys, MAI, and 3.73 gears.
Not worth it, save up for aftermarket manifold, or the OEM FR500 manifold. If fab skills are good and have tools home maid variable length intake is an easy thing.