Piston Ring Set 4.060 1.0mm 1.0mm 2.0mm

The MAHLE PISTONS Piston Ring Set 4.060 1.0mm 1.0mm 2.0mm is a precision-engineered component designed for high-performance engine rebuilds and modifications. This file-fit ring set is manufactured to exacting tolerances for engines with a 4.065-inch bore diameter, making it essential for builders and machine shops performing complete engine restorations or performance upgrades on 8-cylinder applications.

The ring set features a three-piece configuration with 1.0mm top ring, 1.0mm second ring, and 2.0mm oil ring thicknesses. Constructed from steel with HV385 thermal treatment, these rings are engineered to withstand the extreme pressures and temperature cycles of high-performance driving. Standard tension characteristics ensure proper sealing without excessive friction, while the file-fit design allows for precision hand-fitting during engine assembly. This approach enables technicians to achieve optimal ring-to-groove clearances specific to individual cylinder conditions, critical for maximizing compression retention and minimizing blow-by in both naturally aspirated and boosted applications.

This ring set is intended for engine builders, performance shops, and experienced enthusiasts undertaking complete engine builds where precise component matching and hand-fitting are standard practice. File-fit rings are preferred in competition, restoration, and custom engine builds where off-the-shelf tolerance stacking must be eliminated. MAHLE's manufacturing heritage in piston and ring technology ensures consistent metallurgy and heat treatment across the kit, supporting reliable long-term engine operation under demanding conditions.

Proper ring selection depends on understanding your engine's specific displacement, compression ratio, and intended duty cycle. The 4.065-inch bore specification is typical of mid-sized performance V8 engines. Successful installation requires precision honing to exact bore dimensions, accurate file-fitting to clearance specifications, and careful assembly with proper ring gaps set according to MAHLE technical data. This ring set is sold as a kit for one complete engine.