My experience with the girdles is all bad.
Ill fitting hunks of material that would have been better served being turned into beer cans.
This was in a 9 " , but they ( Moroso ) would not fit with out massaging.
I was working at a machine shop at the time , so I figured I would modify their design and eliminate the problems I encountered.
I came up with smaller hunks of crap is all.
Like has been stated above , the strap or U bolt is plenty.