MAHLE 3011240B Performance Piston Ring Set Bore Steel - 3.523in 1.0mm HV385

The MAHLE 3011240B is a high-performance piston ring set engineered for 3.523-inch bore applications demanding maximum durability and minimal friction. This premium ring set features MAHLE's advanced steel construction with their patented HV385 thermal spray coating technology for superior performance in demanding conditions.

Advanced HV385 Coating Technology:

The top ring features MAHLE's patented HV385 supersonic thermal spray face coating, which utilizes a proprietary blend of hard self-lubricating metal and ceramic alloys applied through an aerospace-inspired process. This advanced coating delivers strength and toughness comparable to gas nitride and PVD treatments while maintaining excellent scuff resistance, providing superior bonding and increased durability under high-temperature and high-pressure conditions.

Performance Ring Configuration:

• Bore Size: 3.523 inches (89.5mm)
• Top Ring: 1.0mm plasma moly steel with HV385 coating
• Radial Width: 0.143 inches
• High-strength SAE steel construction resists ring breakage
• Reduced ring mass for lower inertia and improved sealing at high RPM
• File-fit design allows precise end gap adjustment for optimal performance

Key Performance Benefits:

The precision-engineered steel construction offers significantly higher tensile strength and fatigue resistance compared to traditional cast iron rings. The thinner 1.0mm profile reduces ring mass, allowing the rings to better follow the cylinder wall at high RPM and maintain consistent sealing pressure. The HV385 coating minimizes friction while protecting against cylinder wall scuffing, resulting in improved horsepower, reduced wear, and extended service life.

Designed for performance engine builds, racing applications, and high-output street engines where reliability and power are critical. Proper ring gap adjustment and cylinder wall finish are essential for optimal performance and longevity.