A quick google reveals that a decat pipe is available for the 2016> SV650.
https://www.youtube.com/watch?v=Tfh9ihwAO3I
I had a quick look on the GPR UK website but couldn't see it listed, so you'd need to call.
Holeshot Performance, a US company, also sells a "race use only" cat free exhaust but with import duties that would be expensive.
http://www.holeshot.com/suzuki/sv/20...-header-system
but there's one on ebay:
https://tinyurl.com/35eh3fkd
(but it's located in Italy)
I would imagine the SV would be loud without the cat and a Scorpion can.
If the cat was scraping I would have thought you would have seen the scrape marks on it. As loony teens, my friends and I would deliberately see how much we could scrape our side/main stands and foot pegs on our (small) bikes. The point being that the scrapes were plainly visible.