Originally Posted by fgfournet
I'm planning on installing a JDM DC Sport header with a Carsound cat. I want to keep my cat back stock. What size flanges do I need? Or will the muffler shop not have a problem mating all this up? Does it matter what Carsound cat I use?
I have a dcsport header and 2.5 inch converter right now. Be aware that the jdm Dcsport header runs lower than your engine does. If your car is lowered alot, look out.