HKS Super Fire HL Spark Plug Set (6) Heat Range 10

Description

HKS Super Fire Racing Spark Plugs*

Heat Range: NGK # 10
Thread Size: 12mm × 26.5mm
Wrench Size: 14mm

• R35 GT-R stock’s heat range is the same as NGK 8, NGK 9  and the new HKS M50HL is the same as NGK 10. It’s for a high tuning vehicles.
• Reinforced by making the outer electrode bigger(see the pictures below). Also could have a steady ignition and ignition speed at a high load and high RPM by putting the center electrode in the middle of the spark plug.
• Improved the anti-taint property by making thermal edge to prevent the carbon buildup which occurs for the tuned engines.