Just wondering if i performed a de cat, for off road purposes obviously, will it bring a engine light on, will the lambda probe be picking up wrong readings and chuck a light up, anyone on here running a decat on there octy rs, i appreciate any help, theres a rather nice looking 3" downpipe and de cat pipe on ebay, thanks in advance

Yes it would put a cel light up. You would have to get the rear exhaust sensor turned off, which can be done with certain remaps. Also you will get alot more noise and vibration with a decat.

You can space the rear sensor away from the pipe with a special block type thingmy. This works most of the time but the CEL will still come on occasionally.

cheers for the replys i thought it would bring a light on, looks like ill go for the sports cat when i get my full turbo back exhaust,

Yes it would put a cel light up. You would have to get the rear exhaust sensor turned off, which can be done with certain remaps. Also you will get alot more noise and vibration with a decat.

I agree with what you say but mine is both quieter and smoother with no cat :confused:

I agree with what you say but mine is both quieter and smoother with no cat :confused:

I have a straight through 3" Blueflame exhaust and down pipe, which could be why I had extra NVH. Put a small silencer where the cat used to be and it quietened it.