MAHLE 3150053-035 Plasma-Moly Piston Ring Set 4.535" Bore File Fit Standard Tension

The MAHLE 3150053-035 is a precision-ground, plasma-moly piston ring set engineered for high-performance and competition engine builds. Designed for a 4.530" bore with a +0.035" file-fit oversize (4.565" finished bore), this standard-tension ring pack uses a 1/16", 1/16", 3/16" ring configuration and is sold as a complete set.

MAHLE's plasma-moly top rings are constructed from ductile iron with a proprietary plasma face coating, delivering superior tensile strength, hardness, and fatigue resistance. The plasma moly face coating extends service life, resists ring breakage, reduces side wear, and minimizes groove pound-out—critical factors in high-output, high-RPM engines.

Key Features:

• Plasma-moly ductile iron top ring for maximum wear resistance and long service life
• File-fit design allows precise end-gap customization for your specific application
• Standard tension construction for reliable cylinder wall sealing
• 1/16", 1/16", 3/16" ring pack — traditional sizing for big-bore performance engines
• Napier (taper hook groove) second compression ring for superior oil control and cylinder wall scraping
• 3-piece oil ring with stainless steel expander and chrome-faced steel rails for high conformability within the bore
• Ultra-flat ring flanks maximize ring-to-piston groove sealing
• Built with orientation features to prevent incorrect installation
• Manufactured under strict MAHLE quality controls for OE-grade reliability

The MAHLE 3150053-035 piston ring set is an ideal choice for engine rebuilders and performance builders working with large-displacement engines requiring precise, durable sealing solutions. Sold as a complete set.