Wiseco 99.5mm Ring Set Ring Shelf Stock

Wiseco piston ring sets are made specifically to Wiseco's specifications to provide ultimate performance and sealing with Wiseco's wide variety of pistons. From compression and sealing to oil control, rings can make or break piston performance, which is why Wiseco rings are developed and tested for race-ready performance.

Part Type

Engine Piston Ring Set

Product Overview

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.

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

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Reference Information

Piston Rings, Gas Nitrided, 99.50mm Bore, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston, Set

Wiseco XX piston ring sets are designed for use with Wiseco pistons only. They can be used in cast iron, nickel ceramic plating (Nikasil), boron composite, and Electrofusion bores and feature a stainless steel, 1mm thickness, gas-nitrided, barrel-faced top ring. They also contain an under-hook style, 1.2mm thickness, cast iron, phosphate coated, taper-faced second ring. The oil rings in these XX sets are 3-piece assemblies with 2.8mm thickness, gas-nitrided rails, and a stainless steel, flex-vent spacer.

Caution: Wiseco XX 4-stroke rings cannot be used in chrome plated bores; engine damage will occur.