Piston Ring Set 4.350 Bore 1.5 1.5 3.0mm

The Piston Ring Set 4.350 Bore 1.5 1.5 3.0mm by MAHLE PISTONS is a premium compression and oil control ring package engineered for high-performance engine builds and complete piston assemblies. Designed for the serious engine builder or mechanic undertaking a full bottom-end rebuild, this ring set ensures proper combustion sealing and oil management in demanding applications. MAHLE's reputation for precision manufacturing makes this component essential for anyone restoring or upgrading their engine's internals to factory or performance specifications.

This piston ring set features a 4.350-inch bore diameter with a two-piece compression ring stack (1.5mm top ring, 1.5mm second ring) and a 3.0mm oil control ring configuration. The dual compression rings work in tandem to seal combustion pressure while minimizing blowby, critical for maintaining cylinder pressure and fuel economy. The three-millimeter oil ring prevents excessive oil consumption by scraping lubricant from cylinder walls while maintaining a protective film, a balance that separates quality piston rings from inferior alternatives. MAHLE's manufacturing tolerances and material composition ensure consistent ring gap and proper seating against the piston groove, reducing friction and extending engine life.

Engine rebuilders, machine shops, and performance enthusiasts benefit most from this piston ring set when completing a full-bore overbore or sleeve situation requiring a 4.350-inch bore diameter. Installation requires proper ring end-gap measurement and cylinder wall honing to achieve OEM specifications—critical steps that directly impact compression, blow-by rates, and ring life. Whether you're restoring a stock engine or building a high-horsepower stroker, this MAHLE ring set delivers the sealing integrity and durability expected from a global OEM supplier trusted by professional engine builders worldwide.