For many riders, the stock seats are too low and soft. Seat Concepts makes seat kits that address this issue. The seat kits include a taller denser foam, and a new seat cover. The seat kits add approximately 1-3" of additional height. See below for more info. The original seat pan is reused for all the seat kits.
Seat Concepts bought the molds and rights from WRP to produce the seats. Seat covers have changed in style a little, but the foam molds are still identical to the seats that used to be sold by WRP.
Many think 1-3" of additional height is not much but you have to remember that is a static gain. The actual gain is more because the foam is denser and you don't sink in as far like the factory seats.
Kits are available for the following and can be ordered in the online store.