[Hood]

This is what I use on boats and Mikalor is a decent brand although I tend to go for the W5 (316 stainless) option which is not listed here and likely not needed for a bike. I would however opt for the W4 option as it has 304 stainless for the band and a stainless bolt where the W2 just has a steel bolt.

Pardon our interruption...

 

[Hood]

Oh and also note the difference between the style I linked and the one you posted, the insert at the clamping area, probably not so important for clamping a metal exhaust but very important for clamping a rubber hose etc

 

[Hood]

Sounds like it could be what happened.