I would say Powerdyne.
What's it worth? (I've heard that they suck.)
thats about the most used aftermarket supercharger ive ever seen
Yeah, Not the best out there but they sold a ton of them. Durability problems plagued the original internal drive belts. I know you could send it in for upgrade/ repair and I believe the new belt was better than the original one. My buddy had one on his FOX and it ran OK for what it was. I would leave it on for shits/ giggles. If you try to sell it you won't get anything for it. Maybe it'll be worth something in 20 years when someone wants to do a period correct resto on their FOX- LOL.I think they blow, hence the term blower....
I don't think they are bad, but the internals are belt driven and from what I recall the belts seems to stretch, or fail somehow. They were 6 and 9 psi units.