Wiseco 4057GFX GFX Steel Nitride Piston Ring Set 4.057 in. Bore

The Wiseco 4057GFX is a GFX-series gas nitrided piston ring set designed for a 4.057-inch bore, sold as a single-cylinder set. Part of Wiseco's premium GFX lineup, these rings are engineered to deliver superior combustion sealing, reduced blowby, and long service life in high-performance automotive applications.

Ring Construction:

• Top Ring: 1.2mm steel gas nitrided (stainless steel) barrel-faced design for exceptional wear resistance and hardness
• Second Ring: 1.2mm Napier hook-style ring for improved oil scraping and sealing efficiency
• Oil Control Ring: 3mm 3-piece assembly with nitrided chrome-plated rails and a stainless steel expander spacer

Key Features:

• File-to-fit design allows precise end gap adjustment for your specific application
• Gas nitriding surface treatment delivers superior hardness and scuff resistance over standard chrome or moly rings
• Napier-style second ring geometry enhances oil control and cylinder sealing
• Stainless steel top ring material withstands elevated cylinder pressures and temperatures
• Sold individually — order the exact quantity needed for your engine build
• Compatible with Wiseco's late-model EFI piston lineup and other 4.057-inch bore pistons built around the 1.2mm/1.2mm/3mm ring specification

The Wiseco GFX ring set is the standard ring choice for Wiseco's X-series forged piston kits and is an ideal replacement or upgrade for performance engine builds requiring a dependable, high-quality ring package. Order one set per cylinder.