I've been thinking...as you do about the exhaust. It was welded from bits of the two exhaust systems and goes from 2.5 inch to 2.25 inch. Not really restrictive but it could probably do with being 2.5 inch all the way through.
The place that comes to mind is of course PowerFlow as they are the only custom people I know. While of course I don't want anything crap I don't want to pay £500 or something, I don't want it that badly.
Any suggestions or input?