Make SURE they are HD and not just the Sealed Power version of the stock ones. I ordered the HD shafts and got std. Sealed Power shafts. (they only charged me for the std. ones, though.) The Sealed power ones are more brittle than the stock ones are, so do NOT over torque them, or they WILL crack/break. Hopefully they have the REAL HD shafts, now. They didn't before. Hopefully Nick will chime in.