Sponsored Links (Register now to hide all advertisements)
From what I've seen, consensus seems to be that the concave washer is pretty effective as a remedy and tends to last longer than the rubber cover. The rubber cover was an OEM solution to the problem in the past and many folks have one installed and say it's fine. Reshaping the ball is the most robust solution, but requires welding skills as well as the removal of the wishbone from the car, which is more than a lot of folks are willing to do.