I think a little experiment, I just got it out for a couple of test drives and it definetly has boost I have'nt figured out how much just yet and I do intend to figure that out before I do anything to aggressive. You, know I have just been looking online for makers of pulleys, I did'nt even think to check manufacturer. I did'nt think B@M was in business anymore. I'm not going to get one right now, I wont be driveing my car till this spring I'm just trying to get it all up and running again after the supercharger installation. But when I go to buy one I would just like to be able to find one.