MAHLE 3011020 Performance Plasma Moly Steel Piston Ring Set 4.060 Bore 1/16 Reduced Wall

The MAHLE 3011020 is a performance plasma moly steel piston ring set engineered for high-output racing and performance engines with a 4.060-inch bore. Featuring a 1/16-inch (0.0625") top ring axial height and a reduced radial wall (RW) of .190 inches, this set is purpose-built for applications where minimizing piston ring tension and improving conformability are critical to maximizing horsepower output.

The steel top compression ring is treated with a proprietary plasma-moly face coating that delivers exceptional wear resistance, scuff resistance, and extended service life under extreme combustion temperatures and pressures. The plasma moly coating bonds to the steel substrate to create a durable running surface that seats quickly against the cylinder wall.

Key Features:

• 4.060" bore diameter — fits standard and overbore applications at this size
• Steel top compression ring with plasma-moly face coating for superior tensile strength and hardness
• Reduced radial wall (RW) design — .190" wall thickness reduces ring tension, lowers cylinder wall load, and allows tighter piston-to-wall clearances
• 1/16" (0.0625") top ring axial height — lightweight profile reduces reciprocating mass and ring inertia at TDC and BDC
• Engineered to eliminate ring breakage and minimize groove pound-out under sustained high-RPM use
• Ultra-flat ring flanks maximize ring-to-piston groove sealing
• Designed for performance V8 applications commonly used in racing and high-performance street/strip builds

MAHLE performance ring sets are developed using piston ring simulation and computer engineering tools to optimize ring geometry, material, and coating for reduced friction and improved combustion sealing. The 3011020 ring set is sold as a complete set for one engine (8 cylinders) and is compatible with performance pistons requiring this ring package specification.