Quote:
Originally Posted by gramicci101
Do they not measure at the exhaust pipe?
So hypothetically, if I had a catless header but my tune turned the P0420 code off, they'd be fine with it?
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Maybe they could detect you had turned off the P0420 code ....... however, this area is above my pay grade.
On pre OBDII cars and trucks, they sniff at the tail pipe. If they do on the newer ones, I've never noticed them doing it.
humfrz