Denso Spark Plug K20HR-U11 1PC

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.

• Efficient Fuel Consumption and Improved Cold-Starting
• Stable Combustion During Idling
• 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