I know the information is probably here somehwere but I can't seem to string together the magic words in the search box. Shopping for a sidewinder or top mount manifold and with all the options out its hard to pick one. I keep getting snagged on the fact that alot of these companies designed them for the rsx. I'm not trying to spend 1500 on a manifold to find out the downpipe wont fit on my ep3. Anybody know if there is any difference between the two engine bays that would keep me from installing any particular RSX designed kit ? Thanks guys.....