Piston Ring Set 4.150 1.5 1.5 3.0mm

The MAHLE PISTONS Piston Ring Set 4.150 1.5 1.5 3.0mm is a precision-engineered ring package designed for serious engine builders and high-performance automotive enthusiasts. Built to exacting OEM standards, this piston ring set serves as a critical replacement component for engines with a 4.150-inch bore diameter, whether you're rebuilding a stroker, restoring a classic engine, or maintaining peak compression in a modified powerplant.

This ring set combines three critical components that work in concert to seal combustion pressure and manage oil control: a 1.5mm top compression ring, a 1.5mm second compression ring, and a 3.0mm oil control ring. The dual 1.5mm compression rings optimize pressure sealing while reducing friction losses compared to thicker traditional designs—a feature that translates to improved ring flutter resistance and better blow-by control across the RPM band. The 3.0mm oil ring manages crankcase ventilation and maintains proper lubrication film on the cylinder wall, preventing excessive oil consumption and carbon deposits.

MAHLE's manufacturing precision ensures tight tolerances and consistent ring tension, critical for minimizing leakage past the rings during high-boost or high-RPM operation. This piston ring set is ideal for engine builders, machine shops, and dedicated performance mechanics looking to enhance engine longevity and performance consistency.