Can anyone recommend some decent exhaust clamps?

At present i have some stainless steel band type clamps. However, no matter how tight i can get them done up, they let go and the silencer rotates!

In the past I have used two of the channel shaped, bolts and split type locking nuts,... never come loose,...

Have a look for mikalor stainless clamps. There’s a guy on eBay that sells every size under the sun. They seem to work well for me.

Mine are similar to the Mikalor clamps. Think i will use some U bolts and do it that way and wringe its neck!