200 cell Cat on a V6 340 Does it bring the MIL light ?

[JagNut]

I am looking at replacing the cat on a 2017 V6 with the 200 cell type, I have read that a decat throws a code and brings on the MIL light on the display........
Has anyone experienced this with a 200 cell cat ?
Am also fitting K&N filters to improve breathing and perhaps release a couple of horses too,
Grateful for any info on the risk of bringing that dreaded light on if anyone has done this ?
Many thanks in advance

[Gasman2]

As i understand it will at some point trigger a check light best to have the velocity tune at the same time

[cj10jeeper]

I wouldn’t touch a K&N. All the trouble of cleaning and oiling it, no real performance gain and just lets dirt and grit into the engine.
Ran one Om my Z4 and couldn’t give it away..

I do run them in my jJeeps simply due to extreme water and dirt that soaks and ruins paper and stops the engine. I accept engine wear as a consequence

[Gasman2]

There are better paper elements but u really cant tell the difference to a normal filter

[Deleted User 1088]

I wouldn’t touch a K&N. All the trouble of cleaning and oiling it, no real performance gain and just lets dirt and grit into the engine.
Ran one Om my Z4 and couldn’t give it away..

I do run them in my jJeeps simply due to extreme water and dirt that soaks and ruins paper and stops the engine. I accept engine wear as a consequence

Yes agree with these comments .. just change your stock filters more regular .. also not so much of a issue on a forced induction car the K&N will not give that much performance gain .. if any at all

now normally aspirated cars are different

[0800Dinosaur]

I am looking at replacing the cat on a 2017 V6 with the 200 cell type, I have read that a decat throws a code and brings on the MIL light on the display........
Has anyone experienced this with a 200 cell cat ?
Am also fitting K&N filters to improve breathing and perhaps release a couple of horses too,
Grateful for any info on the risk of bringing that dreaded light on if anyone has done this ?
Many thanks in advance

Jagnut, have you seen that thread on the yank forums (edit: just realised it's an international forum) about them working with AP to make new inlets? Idea being to remove the section with the baffles; more induction sound/SC whine. I do like a bit of whine and when the solution is more mature and my warranty is over I may well be interested. Reading your post, thought it may interest you too.

https://www.jaguarforums.com/forum/f-ty ... se-200168/

They're also talking about achieving a ram air effect, but meh. I'm not sure that's even a thing with FI (though happy to be edjumacated if I'm wrong)

[JagNut]

What great info, many many thanks guys, much appreciated
I have now discounted the 200 cell cats as a means of enhancing the exhaust sound and efficiency, the thought of wrestling with the MIL illuminating and the background code clearing saga, have now parked this option for me and the guidance on K&N oiled cotton type filters compromising filtration and not actually being a viable flow gain on a forced induction engine also makes total sense.
I have turned to this device to enhance the sound, it will work for me as I do have active exhaust valves fitted but no internal (optional extra) switch fitted to control them https://www.ebay.co.uk/itm/142783728436
Again my thanks to all