Hi,
I went to the night at Brands Hatch a few months ago and I think it was Jabbalad I may of been talking to about an RS4 fuel pressure rail?
Was it that?  Something about fuel pressure and the stock unit doesn't provide enough?  An RS4 unit is a direct replacement....
Can anyone confirm this?  If so, who's done it and what benefits are there?
Have you had any issues and does it work well with a stage 2+ remap?
Is it easy to fit?  

Thanks