NGK R5674-8 Racing Spark Plugs – Set of 8
The NGK R5674-8 Racing Spark Plug is designed for demanding high-performance and racing-engine applications requiring a 14mm tapered-seat spark plug with a .460-inch reach and heat range 8.
NGK Racing Series spark plugs are built to withstand the heat, pressure, and vibration produced by racing engines. The copper core helps transfer heat away from the firing end, while the triple-seal design helps prevent combustion-gas leakage.
Features
- NGK part number: R5674-8
- NGK stock number: 5657
- Heat range: 8
- Projected-tip design
- Copper-core construction
- Triple-seal design
- Built for demanding racing-engine conditions
- Sold as a complete set of 8
Specifications
- Thread diameter: 14mm
- Thread pitch: 1.25mm
- Hex size: 5/8 inch
- Thread reach: .460 inch
- Seat type: Tapered
- Resistor: No
Important Fitment Note
Verify that your engine and cylinder heads require a 14mm tapered-seat spark plug with a .460-inch reach before ordering.
Important Installation Note
Always check and correctly set the spark-plug gap before installation. Use the gap recommended by your engine builder or engine manufacturer.
Sold as a set of 8.
