I have a 92 civic HB and a JDM B18C3 motor the same as a USDM GSR, and I need to know what i need for the exauhst set up??? I have comptech GSR headers and i welded a bung on them for my O2 sensor but they dont bolt on to the factory cat and or the pipe right before the cat. what should i do get a TEG cat back or a civic or can i just get a piece from the junk yard??? Any tip would be appriciated!