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no one has done a dyno. as of now (with no dyno) the answer is no. with a CAI, u will get colder air but it will not be significant unless you have many other engine mods.
ur second question i do not understand
most of the people who upgrade suspension use tokico shocks (few others use kyb). now with ur trd.. why not get the bilstein and stick a trd sticker on it ? unless its a show car where you will have ur wheel off, most of the shock will not show.
as of trd performance for the I4, i do not know.
a full exhaust setup might be what u wanna look into ? from headers, resonator, to muffler.
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