A4FTW

The next mod i'm going to get is a downpipe, I'm wondering even though it will have the o2 ports on the aftermarket downpipe will the CEL still go on? If so is there anyway to get rid of it if it does come on? Let me know!

99a4turd

yes it will be on.somtime a non fouler will work not always id go with a hiflow cAT

600whpA4

If your talking about a Test Pipe or a down pipe that also replaces the stock cat, then the answer is yes the CEL will be on.

You can use spacers that pull the 2nd 02 sensor out of the exhaust flow.

A4FTW

And these spacers shut it off?

600whpA4

Yes, the CEL is coming on because there is no difference in reading between the 1st 02 sensor and the 2nd(cat effiency) sensor. So moving the 2nd 02 sensor out of the exhaust makes it read different then the 1st sensor.

A4FTW

This is what i found it seems pretty legit. http://o2spacer.com/

600whpA4

From what I understand its basically just a spark plug spacer which is what most people end up using(1 or 2).

A4FTW

Alright thanks, hopefully this will work.

99a4turd

they are called sparkplug nonfoulers autozone has them for 5 bux