DENSO 3268 Standard Spark Plug W20FPR-U10 U-Groove Nickel

The DENSO 3268 (W20FPR-U10) is a standard nickel spark plug engineered for reliable ignition performance in automotive, motorcycle, and powersports applications. This plug features DENSO's patented U-groove ground electrode design that creates a larger, hotter spark for improved ignitability and more complete combustion.

Key Features:

• Patented U-groove ground electrode design produces a larger flame front for better fuel ignition
• Copper core center electrode provides superior thermal conductivity and heat dissipation
• Nickel alloy construction for dependable performance and longevity
• Purified alumina powder insulator with 5 ribs prevents spark flashover
• Machine-rolled threads minimize cross-threading and seizing during installation
• 100% pre-fired to ensure reliable operation out of the box

The U-groove design allows the flame kernel to grow within the groove, reducing flame dissipation and ensuring more efficient combustion. The copper core effectively transfers heat away from the combustion chamber, while the five-rib insulator construction reduces voltage loss. Cross-reference numbers include W20FPR-U10, NGK BPR6HS-10, and various OEM part numbers for Yamaha, Honda, and other manufacturers.