Headers are plm, which i think might be leaking around the slip joint. Money is restriction :( there's a guy selling a brand new rbc manifold, modificated to be a straight swap for the ep3 and dc5 engines.
To make it fit on the ep3 there was an installation guide in his ad where he just undid the front support bolts and pushed it forward to make more space then redrilled the holes to for the bolt to go back on. Here it is
http://www.ebay.com.au/itm/151091894071?redirect=mobile
He rabbles on alot about it lol but I'm deciding to get one or the other. Just wanted to see what would net greater gains by itself after a tune. I was considering 3" exhaust but every 3" I've heard sounds too loud and after a certain rpm it don't sound nice to my ears j's racing 70rr for example. Apparently lose some power too due to less back pressure or something :S I might get exhaust custom made by a good shop tho.