I recently installed a Vito's forged superstock piston in one of my three blasters. After reading a lot of negative comments about the superstock, I have come to believe that most of the negative posters have probably never seen one and certainly have not ridden a bike equipped with one. It is a very nice quality piston manufactured by wiseco, with a unique design, the rings are set lower in the piston and the front of the piston is lowered to increase exhaust port timing. It does make quite a bit more power, and when the bike comes on the powerband, it is easily noticed. Running side by side with both blasters equiped with FMF fattys, 4 degrees advanced timing, reeds, and K&N filters, the ss pistoned bike consistently pulls away. If you are running stock port timing, this is the piston to buy.