I am looking for an exhaust for my 2003 Honda Civic Dx and I really like the sound of the Apexi N1. I was wondering if you could just buy the Ex version or if it is different? Would I need anything else in order to make it work or are they the same in terms of compatability?

 

As stated in the FAQ's thread, you're going to need the header, b-pipe, and catalytic converter to run an EX exhaust on a non-EX.