Hey guys! Can anyone confirm if my US Mugen 4-2-1 header will or will not bolt up to a 99 Civic SI.... Thanks so much guys!!!!!

 

Should bolt up to the head fine (of this I'm sure), but I'm not positive about how the CAT/b-bipe situation is going to work out.

I don't know if this is going to help either (link to King/Mugen/Civic/header, but for a 4-1 on a 99 Si) http://www.kingmotorsports.com/produ...ek/engine.html

 

Thanks for your help Ed...

Anyone know if the CAT/B Pipe will bolt up correctly? Thanks in advance!