“Here’s some real data for you guys...the pulleys work well. I saw 3 psi more on the gear changes and 1 more total on what I thought was a slip-free belt program. The coating helps it grip the belt alot better than my old pulley, without shredding the belt. The fact that I run them should be proof enough but I have sold them to almost all the guys in the Renegade Class and they are still on the cars.. and we don’t run stuff that does not work.”