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Biba,
We are in an Enhanced Smog Check area. The rolling road test here isn't as sophisticated as the Federal Test Proceedure the car was originally certified to, but there is a fairly good correlation. The allows the BAR to really clamp down on the pass/fail specs without fear of many false failures.
In short, you will have to achieve emissions very close to what the car did when it was new. I wouldn't worry about the TS being inherently more polluting than the engine you are replacing. You will need good tuning and, if the car had them before, egr and a catalytic converter.
Mike R
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