I now a guy in Costa Rica who has cats on his bird (like once a year)....2 of them ,one for ea side...but no pictures ,and I`ve lost his email.....

but down there he needs them for inspection.....then removes them until next years inspection, so he has two pipes the same length as the cats , just bolts one on ,takes one off...so it does work...no idea on which cats he uses, but there are several kinds...I bought after an market skinny one for my old Volvo 780 a few years ago.