Downpipes/Cats (and CARB) Questions (in Cali)
12-29-2004, 03:23 PM
#12
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Re: The DP's mount on after the pre-cat. They only replace the secondary cats.
Interesting. I did not know there are 2 sets of cats on the S4. I would assume then that there is an O2 sensor on the 1st cat (before the DP), and one on the 2nd cat (on the DP)?
12-29-2004, 05:41 PM
#14
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I asked legal questions about modifying cats....click link on EPA reqmts
<ul><li><a href="https://forums.audiworld.com/s4b6/msgs/171966.phtml">link</a></li></ul>
12-30-2004, 05:47 AM
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Re: Yes, mostly ricers but still people are having their cars impounded and fined.
Josh from achtuning had to have his RS4 towed a few miles up the road from a show last year just so the CHP wouldn't impound it. CHP love to hang out and check out cars at shows, then wait till they drive out after the show. Then, BAMM! your car is gone.
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