I really don't know anything about the lift. I don't even know what brand it is. The distance between the bolt holes is 1.5". I've read that most lifts are not as high as they say. Since the A-arms extend a little past the shock mounts, it should lift a little more than 1.5". I would say it is probably a 2" lift. As I said, it was on my brother's RZR when he bought it. When my dad bought it from him, he took the lift off. The lift didn't have any writing or markings on it.
I didn't want the spacers either. I could raise it just the same by cranking up the pre-load. I've seen it done before. As I mentioned, after lifting, I set my preload to the softest settings to improve the ride quality.
I should also add, that with the front shocks unbolted and the front suspension hanging as far down as it would go, the lift just fit between the shock an A-arm perfectly. So personally, I wouldn't try anything taller, unless someone makes a big lift that replaces the whole suspension and axles.