Here is the 3guyz replacement nut getting ready to be installed. According to 3guyz their nut is a vast imprivement on the OEM design. They say their nut distributes the retaining pressure much more evenly over the pulley because it covers the entire inner circumfrence of the pulley. I am glad it has that added benifit but the main selling point that sold me was all the reviews stating that it isnt nearly as difficult to remove in the future.