Kit include: Forged pistons, rings, circlips, chrome piston pins. Black Edition - For the person who takes preformance seriously, Wiseco Black Edition pistons are you choice! You are getting the best protection against wear, higher compression, the smoothest operation, and maximum effciency. ArmorFit Skirt Coating conforms to the bore to fit similarily to cast part resulting in smoother and quieter operation. Armorx. Coating on the dome and in the ring grooves acts as a shield to protect the piston from extreme heat and detonation.