NGK Racing Spark Plug Box of 4 (R5670-5)

You're getting a box of four NGK R5670-5 racing spark plugs. These are built tough for demanding conditions, whether you're on the track or just pushing your machine hard. The center electrode is specially designed for durability and reliable ignition, helping you get the most out of your engine.

NGK uses a trivalent metal plating on these plugs, which helps prevent corrosion and seizing. This makes them easier to install and remove down the road. The pure alumina silicate ceramic insulator is strong and transfers heat well, while special nose configurations are there to help improve throttle response. You'll also find corrugated ribs to prevent flashover and a copper core that aids in heat removal. Plus, triple seals are used to keep everything contained.