MAHLE 41549 Perfect Circle Premium Plasma-Moly Piston Ring Set V8 3.976 in. Bore

The MAHLE 41549 Perfect Circle Premium Piston Ring Set is a plasma-moly piston ring set engineered for V8 engines with a 3.976-inch bore, featuring ring thicknesses of 3.0mm (top), 2.0mm (second), and 4.0mm (oil).

MAHLE piston rings are manufactured using an SAE 9254 high-alloy steel base material, delivering higher tensile and yield strength, extended fatigue resistance, and increased material hardness compared to standard ring materials. Each set is pre-lapped at the factory to seat immediately upon installation, virtually eliminating traditional break-in time.

Key Features:

• Plasma-moly top compression rings with a barrel-faced contact area for efficient compression sealing and reduced blow-by
• CNC-controlled gap chamfer on compression rings to optimize sealing and minimize combustion gas leakage
• Napier-style second rings with a reverse-twist design for superior oil control, improved combustion gas management, top ring stability, and best-possible sealing with minimal power loss
• CP-20 oil ring assemblies featuring an exclusive 20-degree ear angle for the best possible side seal against the cylinder wall within the oil ring groove
• Special chemical polish on the oil ring expander for enhanced oil drain-back performance
• Pre-lapped finish for immediate seating and simplified installation
• Ring tension and coatings optimized per application for reduced friction and extended service life

The MAHLE 41549 piston ring set meets or exceeds OEM specifications and is designed so that components cannot be installed incorrectly, reducing the chance of installation error. Whether rebuilding a worn engine or upgrading for performance reliability, the MAHLE 41549 delivers consistent sealing, oil control, and long-term durability.