Wiseco Black Edition Piston Series equipped with ArmorX piston coating and ArmorFit skirt coating adding superior protection in extreme conditions, reduced wear. Smooth, quiet, and trouble free operation. Improved flame travel to maximize air/ fuel burn efficiency. Tool Steel Superfinish piston pin. Improved strength, reduced friction. Improved lubrication and better pin oiling, reduced friction.. Augmented ring land details . Improved ring seal and function. 07-14 Twin Cam 96" 07-14 Twin Cam 96", Compression: 10.5:1, Displacement: 103", Bore: 3.870"/Std, Stroke: 4.375", Positive +5cc