MAHLE 4505MS-15 Performance Piston Ring Set Bore File Fit - 4.500 1.5mm 1.5mm 3.0mm

The MAHLE 4505MS-15 is a high-performance piston ring set engineered for 4.500-inch bore applications with a file-fit design that allows for precise end-gap customization. This 8-cylinder set features metric ring thicknesses of 1.5mm, 1.5mm, and 3.0mm, optimized for performance engine builds requiring standard tension characteristics.

Key Features:

• Bore Size: 4.500 inches with +0.005 inch file-fit tolerance for custom end-gap adjustment
• Ring Widths: 1.5mm top ring, 1.5mm second ring, 3.0mm oil ring pack
• Top Ring: Positive-twist ductile iron with plasma-moly inlay and barrel-faced design for superior sealing
• Second Ring: Reverse-twist tapered-face cast iron for optimal oil control and combustion gas management
• Oil Ring: 3-piece standard tension design for excellent oil control
• Ultra-flat ring flanks maximize ring-to-piston sealing efficiency
• 8-cylinder set (one ring set per cylinder)

MAHLE Performance piston rings are developed using advanced computer simulation tools to minimize friction and deliver measurable horsepower gains. The plasma-moly coating provides exceptional wear resistance and scuff protection, while the precision-engineered ring profiles ensure optimal sealing throughout the RPM range. File-fit rings require end-gap filing to match your specific bore dimensions for maximum performance and reliability.