Replacing the cat+the downpipe all together isn’t a foul strategy. However, most cats aren’t very restrictive these days…unless you’re increasing the Strengthen amount, I’d say the OEM cat is fine. Hey fellas I've a 118d Msport. Previously remapped to approximately 170hp. Was asking yourself if a downpipe is well worth https://c819753.wikimeglio.com/9294908/details_fiction_and_downpipes