I’ll pass, in the many decades I’ve been driving in the many places I’ve lived. I’ve never known anyone to have a converter stolen and I’m certainly not going to spend $200 or more for an antitheft device.
Makes absolutely no sense whatsoever to spend $200 to insure an engine part, not only that, but in the unlikely event at some point in your lifetime, you do have one stolen your insurance company, if your car is still insured for theft, will cover part of it.
If not think of all the $200 you’ve saved, by not wasting your money on an antitheft device