I found some info from other threads about pulleys that can be used with the GM Supercharger Kit for the 2.4L, but the posts are a few years old now. I found this in one of the posts as on option:
http://pulleyboys.com/gm24l.html
Has anyone swapped pulleys before? Is the stock kit pulley the 2.8" variety? What would be the difference in boost psi between the 2.8" and 2.7" pulleys? Just looking for some info before I decide to do anything. Thanks.