ok.. like i said i know next to nothing about c.o.ps

 

I am not totally sure, but the computer will not throw a code when the tune is installed. This is why when you put it back to stock you got a code. The rear O2s went back on along with some other signals. Can anyone back this up? This is just from my experience when my coil pack went bad.

P.S. You should be able to leave your SLPs on...Anything catback is ok for the warranty.