MAHLE 3021224B Performance Piston Ring Set Bore Steel Napier Second Ring - 4.165 1.0mm

The MAHLE 3021224B is a high-performance piston ring set designed for 4.165-inch bore engines. This professional-grade ring set features a low-drag 1.0mm x 1.0mm x 2.0mm configuration engineered to minimize friction while delivering maximum sealing performance for racing and high-performance street applications.

Key Features:

• SAE 9254 steel construction provides extended fatigue resistance and exceptional durability under extreme firing pressures
• 1.0mm steel top ring with advanced thermal spray face coating for superior bonding and increased scuff resistance
• 1.0mm Napier-style steel second ring with 0.136-inch radial wall thickness for superior oil control and compression management
• 2.0mm oil control ring ensures optimal oil regulation without sacrificing power
• File-fit design allows for precise end gap adjustment to match your specific build requirements
• Reduced ring mass and smaller cross-section improve conformability to cylinder bore distortion and reduce inertial forces
• Plain ring set sold in bulk packaging for professional engine builders

MAHLE Performance piston rings are engineered using advanced ring simulation and computer development tools, making them the choice of race engineers worldwide. The smaller cross-section design permitted by the high-strength steel material allows rings to better tolerate inertial forces and seal more effectively against the bottom of the ring groove, providing measurable horsepower gains on the dyno and improved performance on the track.