I priced up a new full 2.5" stainless exhaust system the other week as my down pipe is 2.25" and silencer is a little less than 2" so I think its stifling the turbo somewhat.
Unfortunately my megasquirt died last weekend so that money has now gone so I thought I would cobble together something out of what I already have in the mean time.
Spent £30 on a cherry bomb copy and made this up with bits I already had. 2.25" all the way through. Just needs to be painted black or silver now.
I'm sure it will be louder that what I have already but the turbo silences pretty well and I angled the outlet down so it should be OK for now.
I made it dimensionally how I would want the stainless one made so I may be able to send the pieces off to someone to copy it a bit cheaper
Cheers
Stot