Single Cyl Piston Ring Set 4.315 1.5 15 3.0mm

The Single Cyl Piston Ring Set 4.315 1.5 15 3.0mm by MAHLE PISTONS is a precision-engineered component for high-performance and modified engine builds. This piston ring set is designed for builders and mechanics working with larger displacement or bored-out engines requiring custom ring specifications. Whether you're rebuilding a stroker engine, upgrading to oversized pistons, or restoring a performance application, this MAHLE ring set delivers the compression sealing and durability that serious enthusiasts demand.

The 4.315-inch bore diameter accommodates engines with substantial displacement increases, while the ring stack configuration—featuring 1.5mm and 15mm profiles with a 3.0mm thickness specification—ensures optimal compression, minimal blowby, and controlled oil consumption across the full RPM band. MAHLE's reputation for precision manufacturing means these rings maintain tight tolerances and consistent gap clearance, critical factors in preventing ring flutter and maintaining sustained boost pressure in turbocharged or supercharged applications. The lightweight design reduces reciprocating mass, improving throttle response and reducing parasitic loss in modified powerplants.

This ring set suits engine builders, performance tuners, and mechanical enthusiasts rebuilding single-cylinder or multi-cylinder engines with bores approaching 4.3 inches. Installation requires precise ring end-gap and side-clearance setup—measure carefully and file gaps to OEM specifications for your specific piston and cylinder combination. Compatibility depends on your exact piston design and bore preparation; confirm bore diameter, ring groove specifications, and land widths before purchase to ensure a perfect fit for your engine assembly.