On the RRE website, it says that their downpipe will bolt up only to a few certain cat-back exhausts. Since I already have an evoIII o2 housing(not installed yet, just sitting in my room), I'm definitely going with the RRE downpipe(long) since they make them fit directly to the evoIII.
Anyways, my question is this: I will be getting the rest of the exhaust past the downpipe custom made, and I am curious if the RRE downpipe will bolt up with the custom exhaust. Also, why exactly will their downpipes only bolt up to a few brands? What are the fitment issues with the other brands that cause them not to bolt up to the RRE downpipe? If it's just the difference in the flanges, I am thinking that I could get the apexi N1 flanges and the custom exhaust should bolt right up, correct? Thanks for the help!
