MAHLE 3150139.045 Plasma-Moly Piston Ring Set Bore - 4.045

The MAHLE 3150139.045 is a high-performance plasma-moly piston ring set designed for 4.045 inch bore applications with +.045 inch oversize. This premium ring set features advanced materials and coatings engineered to deliver exceptional performance in demanding engine builds.

Key Features:

• Plasma-moly steel top compression ring for superior tensile strength, hardness, and fatigue resistance
• SAE 9254 steel construction with proprietary plasma face coating extends ring life and eliminates breakage
• Standard tension design for reliable sealing and cylinder wall contact
• 1/16", 1/16", 3.0mm ring width configuration provides optimal sealing and oil control
• File-fit design allows precise end gap adjustment for your specific application
• Reduced side wear and minimized groove pound-out problems
• Barrel-faced top ring ensures instant break-in and maintains consistent cylinder wall contact
• Complete 8-cylinder ring set included

MAHLE Original plasma-moly steel top rings provide excellent tensile strength and hardness, with the steel combined with proprietary plasma face coating to extend life and reduce side wear. The smaller cross-section of the steel ring design allows for reduced ring mass, which better tolerates inertial forces and improves sealing effectiveness at high RPM. These performance piston ring sets are rigorously tested to operate at higher RPM, higher compression ratios, and elevated temperatures while remaining dependable.