MAHLE 3150057-005 Performance Piston Ring Set File-Fit +0.005 Over

The MAHLE 3150057-005 is a precision-ground performance piston ring set engineered for high-output and racing applications. MAHLE has pioneered the use of piston ring simulation and computer development tools to engineer ring packs that deliver measurable horsepower gains by minimizing friction while maintaining superior combustion sealing.

This set is sized at a +0.005" oversize bore and is designed as a file-fit ring, allowing builders to custom-fit end gaps to their specific application and target power level. The file-fit design is preferred in performance builds where precise gap sizing is critical for maximizing cylinder pressure retention and minimizing blow-by.

Key Features:

• Precision-ground ring faces for maximum ring-to-piston sealing
• File-fit design allows custom end-gap setting for performance and racing applications
• Top rings feature plasma-moly inlay on a positive-twist, barrel-faced ductile iron construction for enhanced scuff resistance and durability
• Reverse-twist, taper-faced cast iron second rings for improved oil control
• Ultra-flat ring flanks maximize sealing contact against the piston ring land
• Reduced radial wall (RRW) top ring profile reduces friction and improves conformability
• Compatible with MAHLE and other precision performance pistons
• Sold as a complete set (top, second, and oil control rings)

MAHLE performance piston rings are race-proven components trusted by professional engine builders across drag racing, circle track, and road racing applications. The difference in sealing efficiency and frictional reduction is measurable on the dyno and on the track.