Piston Ring Set 4.175 1.0mm 1.0mm 2.0mm

The MAHLE PISTONS Piston Ring Set 4.175 1.0mm 1.0mm 2.0mm is a precision-engineered performance-series ring kit designed for high-output 8-cylinder engines requiring file-fit installation. Manufactured under MAHLE's exacting standards, this ring set delivers controlled compression and oil management across demanding operating conditions, making it the choice for builders who demand both reliability and performance in rebuild and racing applications.

This piston ring set features a 4.175-inch bore diameter with individual ring thicknesses of 1.0mm compression, 1.0mm secondary compression, and 2.0mm oil control. The HV385 thermal treatment hardens the steel for extended ring life under sustained high-RPM and high-boost environments. Standard tension specifications ensure proper sealing force without excessive drag, a critical balance in performance engines where every horsepower matters. The file-fit design requires honing to precise tolerances, allowing builders to dial in end gaps and clearances for their specific cylinder preparation and intended duty cycle.

This ring kit is engineered for 8-cylinder engine rebuilds spanning street performance, road racing, and professional marine and automotive applications. Builders working with big-block or small-block platforms—whether naturally aspirated or turbocharged—rely on MAHLE's proven metallurgy and dimensional consistency. The file-fit requirement appeals to serious engine builders who customize gap clearances and understand that proper ring sealing reduces blowby, stabilizes oil consumption, and maximizes cylinder pressure for power development. MAHLE piston rings are industry-standard in OEM and aftermarket high-performance engine assembly.