Denso U-Groove Spark Plug

U-Groove Ground Electrode design gives the flame a groove to grow in, resulting in less flame dissipation and a larger flame front for a more complete combustion. This translates to better fuel efficiency and improved throttle response.

• Machine Rolled Threads prevent seizing or cross threading during installation and removal
• 100% pre-fired to assure the highest quality possible
• Purified alumina powder Insulator provides exceptional strength and thermal conductivity
• Five rib insulator prevents Flashover
• Copper-glass seal bonds Center Electrode and insulator for a gas-tight seal