Agency Power vs. Perrin Lightweight Pulley - Review Video
 

Agency Power Lightweight Pulley for the Scion FRS and Subaru BRZ vs. the Perrin Lightweight Pulley for the Scion FRS and Subaru BRZ

Both are 4lbs lighter than stock.

I'll let the video do the explaining. :)
[ame="http://www.youtube.com/watch?v=qkHs0AtZsXs"]Scion FRS and Subaru BRZ Perrin Pulley vs Agency Power Pulley - YouTube[/ame]

That was an elaborate way to say there's no difference

You mentioned the installation is easy, is there a DIY?

Do a search. There's been a few already.

This really wasn't a review... this was somebody TALKING about what I already SEE. hehe..

I was going to get one of these but it just seems like it just won't be that good for the engine over time.