i'm swapping a gsr motor into a 4 door 93 civic.. what exhaust/header/cat combination will fit? like.. can i use the gsr header with the civic cat/exhaust? do i have to fabricate? thanks ahead of time

 

The GSR header is about 4" shorter than other B series which creates a gap between it and your cat/exhaust flange. If you order a cat-back exhaust system you will need to order it for your chassis, same for the cat although most are universal. For the header, if you get an ITR/Si header then it will be the proper length and meet up with the exhaust/cat. Otherwise, using the GSR header you will need a custom piece to fill in or added onto the exhaust/cat to fill the gap.