Wiseco Pro Tru line of pistons utilize a plasma moly “pre-gapped” ring set for the budget minded consumer. Wiseco Sport compact kits include the high-quality NPR XX rings, which are the best quality steel nitrided top rings and napier style 2nd rings.
2nd Ring: 1.2mm Cast Iron / Napier Hook
Bore: 84mm
Oil Ring: 3/16 3-Piece Std Tension
Size: .039-.047-2.8mm
Top Ring: 1mm Alloy Steel / Gas Nitrated