Engineered for high-performance engines, the NGK 4940 Racing Plug - R0373A-10 from the NGK Racing Series excels under rigorous conditions. It boasts a fine wire iridium tipped center electrode and platinum tipped ground electrode, which not only enhance ignitability but also significantly extend durability and improve anti-fouling capabilities. Special insulator nose configurations contribute to superior throttle response, while corrugated ribs effectively prevent electrical flashover. The spark plug's pure alumina silicate ceramic insulator ensures robust strength and efficient heat transfer, supported by a copper core that aids in effective heat dissipation. Additionally, triple seals provide reliable leakage prevention, ensuring consistent performance and longevity in demanding racing environments.

Part number: R0373A-10