Spark Plug NGK 4291 ZFR6F-11

The NGK Standard ZFR6F-11 spark plug (part number 4291) is a reliable solution for a wide range of modern gasoline engines. The extended-reach insulator design optimizes the combustion process in the chamber, ensuring more complete ignition of the fuel-air mixture. The center electrode features a copper core encased in a wear-resistant nickel tip, guaranteeing superior heat dissipation and protection against overheating. Key parameters: 14 mm thread diameter, 19 mm thread reach, 16 mm hex size, and a pre-set gap of 1.1 mm. The model offers stable operation across the entire RPM range and facilitates engine starting at sub-zero temperatures. This spark plug is frequently installed as original equipment (OE) on Honda, Chrysler, and Mitsubishi vehicles, meeting strict durability and fuel economy standards.