Tired of trying to install spindles with the self tapping bolts? This is a newly released replacement for the 130794 spindle assembly that comes with 3 mounting bolts and the mounting holes are tapped. The FSP and replacements have previously been untapped and difficult to install without an impact wrench. Even with an impact wrench installing was sometimes difficult, bolts would break. This new design has fixed that problem. Imporant! Be sure to install the spacer under the pulley (between the pulley and top bearing). Failure to install spacer or installing the spacer above the pulley will result in damage to the shaft and pulley.