So here is the deal, I have a 4th gen with an h22 and dc header (NOT the one w/ 2.5" collector) and apexi world sport exhaust except the flange thta bolts to the cat was cut off and I need a new one. the problem is, I don't think that the triangel flanges for different diameter piping holes will line up. I have a stock catalytic converter, but if I weld a flange to teh world sport to fit that, once I get a hi-flow cat I will get 2.5" and don't think the flange bolt holes will line up correctly. is my best bet to just buy the new cat, weld on a 2.5" 3 bolt flange to the world, sport cut off the flange from the header and expand that to 2.5" and weld on another 2.5" 3 bolt flange there. I don't wnat to modify the collector if it's going to cost me a bunch because i'd just probably save for a new header w/ a 2.5' collector already.. I just want to get my car driveable for now with eth stock cat and have wore work done over winter. like new high flow cat and maybe collector mod...

 

anybody got any suggestions?