I have a custom header-back exhaust, except when I got the exhaust I didn't have a header. So I'm not sure exactly where they connected it, but there's a flex pipe at the very front of the exhaust system visible from underneath the car. I'm thinking about getting the DC Sports 4-2-1 header. Is there anything I need to do besides connect the header to where my exhaust system begins?

 

are you talking about a "cat-back exhaust?" got any pics?

 

not a cat-back, a full exhaust system. I'll get a pic tomorrow, but when you look under the car there are no old pipes. from the very front to the back is the custom piping.