Removed the mufflers and header pipes so I could remove the flapper valve and found the other pipe was  just as bad, so I also removed the balance pipe. The flapper was a prick to remove the rest was fairly easy. I used 316 s/s

and stainless in the mig, it welded up easy...Result looks a lot cleaner and sounds f-king amazing.....BUT LOUD...

Pics as ( if I can get it to work )   Hopefully got this in the right place, slowly getting used to this forum...

Balance pipe restriction

Flapper valve restriction

Pipes off

Flapper valve removed

Other Pipe

Bits I put in the bin

 

Back together with S&S slashcuts