Thank you gentlemen.
I have gone for a Bailey fitting kit in the end and I am gonna try it with a Bailey DV26 I have from my other car. If that doesn't work I will have to try a forge, spec-r, hks, or bllitz. I thought I would try this because I heard that some of the evo's react well to the atmospheric d.v and some don't. Apparently a company called 'Impossible Performance' do an australian dump valve that makes a hell of a noise anybody tried one?
If any of you ever want bits for your cars give me a buzz at work and I can sort you out a nice price. Blitz stuff and pretty much every make related to performance tuning.
Thanks for the advice it's much appreciated.
Jon.