"Magnum Poly-Locs - Schumacher" any one bought one lately?

The only mount that lasted longer than a week were the mopar performance ones. still have on in my tool box....but that was when i had a warmed over 340. with the 408, i have to step up.
As far as vibration? Uncorking my exhaust cause all kinds of vibration at idle. don't think i will be able to tell the difference.....we will see.