$200 is the normal price.

Installation is pretty easy, but plan on taking a couple hours for your first pulley change. Removing the stock cage assembly is a bit of a pain. Be sure to save the stock stuff, because you will need to put it back on if you ever need any warranty work. The larger pulley will void your warranty.

With a 6# pulley I would put it on a dyno and have them check the A/F ratio just to be safe.