I just watched a review for a 2024 M4 where the guy was running catless downpipes and using some mini "CATTED" O2 bungs. He claims to have driven a couple of thousand miles with zero CELs. These are the items in question
ttp://www.bigdaddiesgarage.com/mini-cat-cel-fix.html
Has anyone here used these and had any experience with them?
I believe this topic was very briefly touched on before but didn't really go anywhere.
Thanks.