Piston Ring Set 4.070 043 043 3.0mm

The MAHLE PISTONS Piston Ring Set 4.070 043 043 3.0mm (SKU: MAH4070ML-043) is a performance-grade ring kit designed for both naturally aspirated and turbocharged eight-cylinder engines requiring precise bore-to-ring tolerances. This versatile ring set is ideal for applications where OEM or stock rings have reached thermal or durability limits.

This file-fit ring set features a low-tension design with plasma-moly coating, which reduces friction losses while maintaining superior oil control and minimal blowby. The compression and oil-control rings are made from ductile iron, providing a balance of durability and reduced weight compared to cast iron alternatives. The 0.043-inch compression ring thickness and 3.0mm oil-ring configuration ensure controlled expansion under thermal load.

Ideal for high-revving or highly boosted eight-cylinder builds, this ring set helps manage friction, translating to gains in horsepower and fuel efficiency. While file-fit rings may require specific installation procedures, they offer the precision needed for performance applications. This makes them a great choice for enthusiasts looking to maximize their engine's potential.