I have a question about the USDM ITR header. This guy is going to sell me his b18c1 swap and it has a USDM ITR header. i'll be putting this swap into my 2000 civic ex coupe. what exhaust modification will i need to make in order for this header to fit? will i need to add some piping? how large is the opening?

my current setup is 2000 civic ex coupe with stock cat conv and apexi n1 full catback.

thanks!

 

i doubt you will have to make any modifications

 

You shouldn't need to add anything to the exhaust. The USDM ITR "header" is nothing more than a cast factory piece. It's not a true header like the JDM ITR piece if that's what you're thinking.

 

Might not fit the civic cat.

 

the header is from a 98 USDM ITR... anyone know for sure what modifications i will need to make with my 2000 civic ex coupe?