Only down side I see is they have a different bolt pattern than the ZZP/Intense which is what most used pulley's going for $25-$40 happen to be.
After buying one or two new pullies, I've come to understand that the pulley will show minor wear, but nothing that would cause you to pay more than $30-$35 for a pulley in whatever size you want.
Upside is a growing number pulleyboys and Nate H pullies out there to pickup for your smoothflow system.
In the end it's about functionality and overall cost. No, that's not right at all, it's about horsepower!
