DENSO pioneered the use of platinum in spark plug manufacturing, to maximize the longevity and enhance the durability of the spark plug. Platinum offers superior resistance to erosion and corrosion enabling Denso to create a spark plug capable of consistent and extended operation.

One of the most important features of most of Denso’s spark plugs is the U-groove ground electrode. Denso’s patented U-groove spark plugs enable complete combustion by allowing the spark to fill the gap created by the ’U’ shape. The ball of fire created in the U-groove develops a larger and hotter flame front that virtually eliminates excessive fouling and erratic starts by poor fuel mixtures. The U-groove is located on the ground electrode because this is the place that is least affected by wear. Thus ensuring that the benefits of the U-groove last the entire lifetime of the spark plug.

• The ZU Platinum spark is designed to meet the needs of high-powered engines and high performance riding conditions.
• These spark plugs offer a powerful alternative for normal applications.
• Features a thin 0.7 mm diameter platinum centre electrode and taper cut U-grooved ground electrode.
• Provides a stronger spark, easier starting, improved acceleration and improved combustion efficiency.

More features of Denso platinum spark plugs:

• 100% PRE-FIRED — Assures the highest quality possible.
• COPPER-GLASS SEAL — Bonds the center electrode and insulator together for a gas-tight seal. Maintains proper heat and excludes hot combustion gases.
• FIVE-RIB DESIGN — Prevents flashover and decreases voltage loss.
• PURIFIED ALUMINA POWDER INSULATOR — Provides exceptional dielectric strength and thermal conductivity allowing the material to stand up to extreme stress.