S13 - S15 SR20DET NGK V-Power Racing Spark Plug Set of 4

• Genuine NGK Product
• Perfect from street to track
• Increase performance as well as MPG
• Lowers ignition system voltage requirements
• Affordable NGK Racing Plug designed for the SR motor to from 15 - 20 psi of boost

NGK's V-grooved center electrode moves the spark to the outer edge of the electrode for improved ignitability in all combustion chamber conditions. This configuration is especially helpful for throttle responsiveness, quicker corner exits, and more power on the bottom end. The high-purity alumina silicates used in the insulators of NGK Spark Plugs helps keep the spark plug tip warm enough to burn off deposits at low-speed, yet still be able to transfer enough heat during high-speed operation to prevent detonation and pre-ignition :: Heat Range 8 is used for 15 - 20 pounds of boost ::