Hi everyone, been looking through the posts and carnt find much info on the subject of swapping out front and mid cats on the bmw1m coupe.
I don't want the hassle of having to put the cats back in for the yearly MOT so
For me de-cat front pipes are not really an option,I am after any advice people have on the best compromise of differant mixes of cell ratio cats that will still pass the MOT and not give any warning lights or error codes.maybe putting 100 cell cats in front and middle ?would that work or 200cell front and none in the mids,
Any advice would be great fully received
Many thanks
k
