I scored a Kerker exhaust can and link pipe cheap on ebay. The can is pretty beaten up, but with a bit of a spruce up it’ll look fine (did I say it was cheap?). I cut about 4 inches off the length to make it look more Kerker-ish.
I modified the link pipe to make it 2 into 1, before it was just a bit of curved pipe. I made the exhaust from a Ducati system I cut up. It looks pretty Heath Robinson now but when it’s painted black and the Kerker can is cleaned up with the name plate touched up and re-attached it’ll look pretty good I think and very 80’s.