PERFORMANCE NAPIER THM13 4.155 X .043 .135IN RW RING SET PLAIN

The MAHLE Original Piston Rings 302-1260 are engineered for optimal sealing and maximum power output in high-performance racing engines. These rings are available in various materials, including cast iron, ductile iron, and steel, to meet the demands of harsh operating conditions.

The SAE 9254 steel piston ring material offers superior fatigue resistance and strength, outperforming other materials in the industry. The rings feature a High Velocity Oxygen Fueled Thermal Spray Coating (HV385) which improves ring face wear by over 50% without increasing cylinder bore wear. This coating provides strength and toughness comparable to heat treatments while remaining scuff-resistant to the cylinder wall.