DENSO 4002 U-Groove Standard Spark Plug

The DENSO 4002 is a high-performance standard spark plug engineered with U-Groove technology for superior ignition and combustion efficiency. This spark plug features a unique U-shaped ground electrode design that creates a larger, more concentrated spark kernel compared to conventional spark plugs.

Key Features:

• U-Groove ground electrode design provides better ignitability and more complete fuel burn
• Copper core center electrode for excellent heat dissipation and thermal conductivity
• 14mm thread diameter with 3/4" reach and 13/16" hex size
• Resistor construction reduces electromagnetic interference with vehicle electronics
• 0.044" spark gap for reliable ignition performance
• Purified alumina powder insulator for superior dielectric strength and heat transfer

The U-Groove technology concentrates the spark energy into a more focused point, resulting in improved throttle response, better fuel economy, and reduced emissions. DENSO's precision manufacturing ensures consistent performance and long service life across a wide range of automotive applications.