I just bought a B18 hatch w/ YS1 and I love it. But the previous owner just pieced together an exhaust for the winter, which includes LS header, GSR downpipe, magnaflow cat back I think. Its on H&R race springs and over any bumb over 35mph I scrape that downpipe. I want to get a header and exhaust and woud like to know what will fit without any major modifications.

I searched but didnt find much on B18 hatches at all.

 

just get a LS header. Search around for which one you like best. It does not matter what car your motor is in just the motor. Good luck and have fun.