Is the catalytic converter from a 99 GSR the same size as a cat from a 00 Si ?

 

i think so, but the bolt pattern that hooks up to header is different, nothing a re-welding wouldn't fix though

almost like it's rotated...sorry bad at painting pictures... ...

someone correct me if i'm wrong, but i remember something like that came up when i wanted to get an integra header for my car.

 

Bump...

Thanks, but can anyone confirm this?

 

Anyone?