Wiseco 4052GFX GFX Series Piston Ring Set 4.052 in. Bore 0.047 in. File-Fit Gas-Nitrided Steel

The Wiseco 4052GFX is a GFX-series high-performance piston ring set designed for a 4.052-inch (102.93mm) bore. This is a single-cylinder ring set, supplying all rings needed for one piston. These rings are built to Wiseco's exacting specifications and are a direct match for Wiseco's late-model EFI and small block Chevy piston lineups that are engineered around the 1.2mm Steel Nitride and Napier GFX ring configuration.

Ring Construction:

• Top Ring: Gas-nitrided steel, 0.047 in. (1.2mm) thick — provides excellent wear resistance and superior sealing under high-heat, high-compression conditions
• Second Ring: Phosphate-coated cast iron Napier-style, 0.047 in. (1.2mm) thick — improves oil scraping and sealing efficiency
• Oil Ring: 3-piece design with a stainless steel spacer and chrome-plated rails for reliable oil control
• Ring Pack Thickness: 0.047 in. x 0.047 in. x 3.0mm (top x second x oil)

Key Features:

• File-fit design — allows precise end gap tuning to match your specific application and engine build
• Standard tension — optimized for performance street and race use without excessive friction
• Compatible with Wiseco's late-model EFI piston lineup and select small block Chevy applications
• Sold as a single-cylinder set — order the quantity equal to the number of cylinders in your engine

Wiseco piston ring sets are developed and tested for race-ready performance, delivering enhanced compression sealing, reduced blow-by, and precise oil control. Order one set per cylinder.