Hello, I am wondering if the Fluidamper Coupler really does much as far as vibration? Does the Fluidamper Coupler replace just one side, or both coupler halves? Can They go bad or quit working? Any input would be greatly appreciated. Thanks in advance.

if you have one , use it. they are great at keeping the motor from shaking. a real plus if you have triple pipes, and are having trouble loading up. I haven't heard of one breaking , mine has been one for almost 5 yrs.