I just did a ITR swap in my 2000 civic coupe and i ran into a header downpipe problem. the header that came with my motor is a itr header i believe and it seems like 7 inches short to my cat converter. I was wondering if anyone knows if the 99-00 civic si headers will bolt right on or will it also be short? I just dont want to dump $300 into some DC 4-1 99 civic si headers and it doesnt bolt on.

 

go to a muffler shop and have them make an extension for you.