Part Number: 9000XX

Description: High Performance Piston Rings

Oil Ring: 3/16 3-Piece Std Tension

Top Ring: 1mm Alloy Steel / Gas Nitrated

Size: .039-.047-2.8mm

Bore: 90mm

2nd Ring: 1.2mm Cast Iron / Napier Hook

Notes: *Unless Noted - Rings Sold Individually - Order Specific Quantity Needed*

Notes: Not for sale in California not CARB Legal

Details: 

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. Our late model EFI lineup and several small block Chevy pistons are designed around the our 1.2mm Steel Nitride and napier GFX ring sets. Many of our big block sets utilize a .043 back cut top ring for extra material thickness around the intake valve.