Piston Ring Set 4.155 Nitride 1.2 1.5 3.0mm

The Piston Ring Set 4.155 Nitride 1.2 1.5 3.0mm is engineered for high-performance 8-cylinder engines that demand uncompromising sealing and durability. As part of the Premium Race Series, these rings are designed to withstand the extreme cylinder pressures and thermal loads found in competitive racing environments. This kit provides a comprehensive solution for engine builders seeking to maximize compression and minimize blow-by in a 4.155-inch bore application.

Constructed from high-strength steel with a nitride coating, these rings offer superior hardness and reduced friction compared to traditional materials. The set features a 1.2mm top ring, a 1.5mm second ring, and a 3.0mm oil ring, all utilizing a file-fit design for precise end-gap customization. This file-fit approach ensures that every cylinder achieves an optimized seal tailored to the specific heat range and fuel type of your build.

Professional racers and performance enthusiasts benefit from the standard tension oil rings, which maintain excellent oil control without creating excessive parasitic drag. Whether you are refreshing a drag strip powerhouse or building a high-output street engine, these specifications ensure long-term reliability and consistent power delivery. This kit is specifically configured for 8-cylinder blocks and requires professional measurement and filing during the installation process to achieve peak efficiency.