Piston Ring Set 4.395 1.5 1.5 3.0mm

The Piston Ring Set 4.395 1.5 1.5 3.0mm by MAHLE PISTONS is a crucial component for engine builders and mechanics engaged in top-end rebuilds or performance modifications. These precision-engineered piston rings are designed to effectively seal the combustion chamber, manage oil control, and maintain optimal compression throughout the engine's operating range.

Manufactured to exacting tolerances, this piston ring set features a 4.395mm bore specification and a 1.5/1.5/3.0mm ring thickness profile, which is optimized for effective gas sealing, blow-by control, and oil scraping efficiency. The top compression ring (1.5mm) provides primary sealing under combustion pressure, while the second ring (1.5mm) supports secondary compression and reduces blow-by. The oil control ring (3.0mm) is designed to manage lubricant distribution and prevent excessive oil consumption.

This three-piece design is compatible with both stock and modified engines, ensuring reliable performance across naturally aspirated, boosted, and high-RPM applications. Proper installation requires careful ring gap setup and verification of piston-to-ring clearance for your specific engine platform, which are critical steps to prevent issues such as ring flutter and excessive blow-by.