Only if they get oiled... John and I have tryed all different makes and models of the elephant feet and without an oil supply to the ball in the foot they won't last 5k miles and you will have to re-adjust them twice a week. Heres some food for thought http://www.b2600turbo.com/valve_adjustment_screws.htm Lots of info on there, I am running Oiled Swivel Feet and prefer them over the feet.