MAHLE 4145ML-043 Performance Piston Ring Set Bore File Fit - 4.140 043/.043/3.0mm

The MAHLE 4145ML-043 is a high-performance piston ring set designed for 4.140" bore applications with a +.005" oversize tolerance. This ultra-low friction ring set features advanced file-fit design for precise end-gap customization and includes low tension rings to maximize horsepower by minimizing friction losses.

Ring Configuration:

• Top Ring: .043" ductile iron with plasma moly coating and barrel face profile for superior sealing and wear resistance
• Second Ring: .043" cast iron reverse twist design for optimal oil control and cylinder wall sealing
• Oil Ring: 3.0mm three-piece low tension style for reduced friction and improved ring-to-piston sealing
• File-fit design allows precise end-gap adjustment during installation

Performance Features:

• Ultra-flat ring flanks maximize ring-to-piston groove sealing and reduce blow-by
• Low tension design reduces friction for measurable horsepower gains
• Computer-developed profiles using advanced piston ring simulation technology
• Plasma moly coating on top ring provides excellent wear characteristics and faster break-in

MAHLE pioneered the use of piston ring simulation and computer development tools to create rings that deliver free horsepower through successfully minimized friction. The performance difference is measurable on the dyno and proven on the track, making these rings ideal for high-performance and racing applications.