hey guys I need some help, I have a 90 HB si with a B20b I'm throwin in and was wondering if an oem ciiv exhaust will fit onto the integra hi flow cat I have on there. anyone? thanks in advance

 

The cat should be on the car shouldn't it? Or did you remove the whole engine, header, and cat from the donor?

 

Well I have an apexi exhaust with the stock cat on it right now but I want to use a stock exhaust system. I got an integra header for it and I know that it won't fit the 1.5 cat for the civic, so I got a hi flo for an integra as well.