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boring the TB will do nothing unless you bore the intake plenum i suggest you forget ka na and piece together a turbo kit... it'll be difficult and cost you money but the na set up you speak of is expensive (machine work and balanced crank = $$$$)... if you are set on having high comp then i'm told the best way to do it is SOHC pistons (you had that right), 91 spec cams, z32 fuel filter, exhaust, intake, and if you wanna spend the money a good port polishing job on the head wouldnt hurt...
did you say your putting this in a corolla? i was confused about that statement
trust me dude turbo is way better
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