MAHLE 3010240B PC479 Fire-Power Plain Ring Set 4.380" Bore .017" Dykes Top Ring

The MAHLE 3010240B is a high-performance PC479 Fire-Power plain piston ring set engineered for 4.380-inch bore applications. This professional-grade ring set features a .017-inch Dykes-style top ring design, optimized for extreme racing conditions including nitrous oxide injection, turbocharging, and supercharged applications.

Key Features:

• 4.380-inch bore diameter for precision fitment
• .017-inch (approximately 1/64-inch) Dykes top compression ring design
• PC479 Fire-Power series construction for maximum durability
• Plain ring design without coating for specific break-in requirements
• Engineered for high-RPM sealing and extreme cylinder pressures
• Reduced radial wall thickness minimizes friction and maximizes power output
• Compatible with big block and racing engine builds

About Dykes Rings:

The Dykes ring design features an L-shaped cross-section that provides superior combustion sealing under extreme pressure conditions. This configuration allows combustion gases to push behind the ring, increasing sealing force as cylinder pressure rises—making it ideal for high-boost and high-compression racing applications.

Applications:

This ring set is designed for professional engine builders and serious racers who require maximum performance and reliability. The plain finish allows for custom break-in procedures and specific bore surface finishes optimized for racing conditions. Ideal for drag racing, road racing, marine performance, and other high-performance applications where engine durability and power output are critical.

Note: File-fit rings require individual end gap adjustment during installation. Proper ring gap setting and bore finish are critical for optimal performance and longevity. Consult MAHLE installation guidelines for specific gap recommendations based on your application.