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Originally Posted by Corbic
INone of those features would cause a car to no longer meet emissions - in the sense of actually passing an actual pipe-test.
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Passing an annual tailpipe test is not the same as the extensive certification OEMs go through and does not cover most driving conditions. Tailpipe tests are a spot check meant for catching broken cars.
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They have no data to support a E85 Tuned STI is causing more pollution then a stock STI on 91. They have no information showing Speed-Density is releasing more emissions then MAF.
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And you have no data that it wouldn't, therefore the rules default to you can't change it unless you have the more extensive testing to prove that overall emissions are still within limits. If you can do that, provide the data, the part can get a CARB EO.