Quote:
Originally Posted by jad03060
FWIW, in the US, making changes to the emission controls can get you into trouble. The flap is there to help the vehicle warm up quicker by getting the catalytic converter up to temperature faster. In the meantime, you're going to be spewing more emissions than you should. All this for a little cold start improvement in sound?
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What kind of trouble? I've seen people drive around with catless downpipes and pass emission tests - which is basically the standard in Illinois as far as emissions goes. I've never seen anyone get into "trouble" for messing with an exhaust - unless maybe Cali?