Hey guys

I have a 1990 EF hatch with a JDM B16a1 and a ITR header and want to buy an after market exhaust for my car. I am currently looking into either the Tanabe touring medallion or the super hyper medallion. The question I have is which catalytic converter and or flanges do i have to get to make everything mate up considering that the ITR header is a 2.5 collector and the exhausts are 2.25. Also if someone could provide a site that supplies any items listed and the proper gaskets I will need I would greatly appreciate it.

Thanks alot

Steve