MAHLE 4095MS-15 Piston Ring Set Bore File Fit - 4.090 1.5mm 1.5mm 3.0mm

The MAHLE 4095MS-15 piston ring set is engineered for 4.090" bore engines with a +.005" oversize tolerance. This file-fit ring set features standard tension construction with metric ring widths of 1.5mm, 1.5mm, and 3.0mm, providing an optimal balance of sealing performance and durability for performance and racing applications.

Ring Configuration:

• Top Ring: Ductile iron construction with plasma moly coating and barrel face profile for superior wear resistance and oil control
• Second Ring: Cast iron reverse twist design that enhances sealing and scrapes excess oil
• Oil Ring: 3-piece standard tension design for reliable oil control across the RPM range

Performance Engineering:

• Ultra-flat ring flanks maximize ring-to-groove sealing and minimize blow-by
• Advanced computer simulation and development reduces friction for measurable horsepower gains
• File-fit design allows precise end-gap adjustment for optimal performance
• Metric sizing provides compatibility with modern performance pistons

MAHLE's reputation for precision engineering makes these rings a trusted choice for engine builders who demand consistent quality and proven performance. The plasma moly top ring coating delivers exceptional durability under high-heat, high-stress conditions while the reverse twist second ring provides superior oil control.