Piston Ring Set 4.045 1.5 1.5 3.0mm

The MAHLE PISTONS Piston Ring Set 4.045 1.5 1.5 3.0mm is designed for builders and mechanics engaged in serious engine rebuilds and high-performance modifications. This product is ideal for those restoring classic engines, upgrading to stroker kits, or refreshing worn powerplants, as quality piston rings are essential for maintaining cylinder sealing integrity and compression retention.

Featuring a 4.045-inch bore diameter, this ring set includes a 1.5mm top compression ring, a 1.5mm second compression ring, and a 3.0mm oil control ring. This configuration is designed to optimize ring tension, minimize blowby, and effectively manage oil consumption across a wide RPM range. The dual 1.5mm compression rings work together to seal combustion pressure while reducing friction losses, and the 3.0mm oil ring controls crankcase ventilation.

Engine builders and mechanics working on 4.045-inch bore applications, including many small-block and mid-displacement platforms, will find this MAHLE ring set compatible with both street and competition builds. Proper ring gap setting and honing to the correct crosshatch finish are essential for optimal performance and longevity.