Update....
The develoment exhaust should be completed over the next few days.
90mm downpipe, 76mm full system and 304 stainless system, full TIG welded with Stainless cast flanges plus titanium tips. Should sound well!!!
Also some doubters didn't believe my 8.55 second run to 100mph, saying it was downhill, so to silence them I did a downhill run.......