MAHLE 4285MS Piston Ring Set Bore File Fit - 4.280 1/16 1/16 3/16

The MAHLE 4285MS piston ring set is designed for engines with a 4.280" bore diameter (plus .005" oversize) and features a file-fit design that allows for precise end-gap adjustment during installation. This standard tension ring set uses the proven 1/16", 1/16", 3/16" configuration for optimal sealing and performance.

Ring Configuration:

• Top Ring: Ductile iron with plasma moly coating and barrel face profile for superior wear resistance and sealing
• Second Ring: Cast iron with reverse twist design to enhance oil control and ring seal
• Oil Ring: 3-piece standard tension design for effective oil management

Key Features:

• File-fit design allows custom end-gap adjustment for your specific application
• Ultra-flat ring flanks maximize ring-to-groove sealing and minimize blow-by
• Advanced materials and coatings reduce friction for improved horsepower
• Standard tension oil ring balances oil control with ring life
• Precision-engineered using MAHLE's computer simulation technology

MAHLE's engineering expertise and quality manufacturing ensure these rings deliver reliable performance in street, performance, and racing applications. The plasma moly top ring coating provides exceptional durability under high heat and pressure conditions.