Before I start I have a 1.7cdti civic 2005, lol Right went to go get the decat put on today but ran into an issue, i wanted to weld flanges onto the decat so I can remove it and change when I wish. Basically the exhaust place had the flange that connects the decat to the centre pipe, but they didn't have the flange that connects the decat to the downpipe.?! Been around everywhere an cant find one, Ben to scrappys, exhaust places but no1 has one!!! The guy said sleeving it but I've herd sleeving near the engine side it can leak? Also of I sleeve I won't be able to put the cat on at a later date