Product Description
NGK R5671A-9 Racing Spark Plugs Set of 8 | Heat Range 9 Non-Resistor Performance Plugs
NGK Stock #5238 | 14mm Thread | .750" Reach | Copper Core Racing Spark Plugs | High Performance Applications
Built for extreme conditions, the NGK R5671A-9 Racing Spark Plugs are designed to deliver consistent ignition performance in high-output engines. As part of NGK’s Racing Series, these plugs feature advanced construction including a pure alumina silicate ceramic insulator for superior strength and heat dissipation, along with a copper core that efficiently removes heat from the combustion chamber. The specialized insulator nose design enhances throttle response, while corrugated ribs help prevent flashover in high-voltage environments. Whether you're running boosted, nitrous, or high-compression setups, these plugs provide the durability and reliability serious performance builds demand.
Key Features & Benefits
- NGK Racing Series Performance: Engineered to handle extreme engine conditions including high boost, high compression, and racing environments.
- Heat Range 9 Design: Colder heat range ideal for high-performance and forced induction applications requiring enhanced heat control.
- Copper Core Construction: Improves heat dissipation and ensures consistent spark performance under demanding conditions.
- Advanced Insulator Technology: Alumina silicate ceramic and corrugated ribs enhance durability and prevent electrical flashover.
- Ready to Install: Factory pre-gapped at .032" for convenience, making installation quick and straightforward.
Key Fitments
- Thread Size & Reach: 14mm thread diameter with .750" reach and gasketed seat design.
- Hex Size: 5/8" hex for standard spark plug socket compatibility.
- Application Use: Ideal for high-performance, racing, boosted, or modified engine applications requiring a non-resistor plug.
