MAHLE 3010994B Performance Piston Ring Set Bore Plasma-Moly Steel - 4.190 1.5mm

The MAHLE 3010994B Performance Piston Ring Set is engineered for high-performance engine applications requiring 4.190-inch bore diameter. This premium ring set features a 1.5mm plasma-moly coated steel top ring with .151 radial wall thickness, designed to deliver exceptional durability and sealing performance under demanding operating conditions.

Key Features:

• 4.190-inch bore diameter for precision fit
• 1.5mm thin profile steel top compression ring for reduced friction and weight
• Plasma-moly face coating provides superior scuff resistance and extended ring life
• High-alloy steel construction offers increased strength and resistance to breakage compared to cast iron
• .151-inch radial wall thickness optimized for performance applications
• Designed to minimize combustion gas blowby and maximize cylinder sealing
• Lower ring mass reduces inertial forces for improved high-RPM sealing

Performance Benefits:

MAHLE's plasma-moly steel ring technology combines the strength advantages of SAE 9254 high-alloy steel with advanced plasma face coating to extend service life and eliminate common failure modes. The reduced 1.5mm cross-section allows the top ring groove to be positioned closer to the piston crown, reducing crevice volume and unburned fuel emissions. The lighter ring design better tolerates high inertial forces at elevated RPM, maintaining consistent sealing against the ring groove bottom for optimal compression and power output.

This ring set is ideal for performance engine builds, racing applications, and high-output street engines where durability and power gains are critical. The plasma-moly coating ensures excellent break-in characteristics and long-term wear resistance even under high cylinder pressures and temperatures.