WISECO Forged Pistons. Wiseco Sport Compact pistons are made from dedicated forgings produced in-house to give you a light weight piston with superior strength and optimal design. Being the multivalve piston technology leader, the line features specially designed valve pockets, complex dome and crown shapes, the steel nitride/napier rings and optimised skirt profiles. The pistons come standard with our ArmorGlide® coating material for reducedriction and noise, freeing up horsepower. Sold in complete sets with pins and rings.