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Discussion Starter · #1 ·
I'm looking for way to improve my 2ZZ in my Corolla XRS. I don't want to go turbo, i will probably go nitrous, but i would like to do basic mod, as far as i know, no CAI yet for the XRS, anybody have real result with unichip or something similar?

I'M also planing on a new muffler. Any suggestion on muffler / cat back that don't sound like hell (or like most civic?) and give some hp

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