DENSO 4038 U-Groove Copper Core Spark Plug

The DENSO 4038 U-Groove spark plug delivers reliable ignition performance for a wide range of gasoline engines. Featuring DENSO's patented U-Groove ground electrode design, this spark plug creates a larger, more robust spark than conventional flat electrode plugs, resulting in improved ignitability and more complete combustion.

Key Features:

• U-Groove ground electrode technology for enhanced spark dispersion and flame propagation
• Copper core center electrode for superior heat dissipation and thermal conductivity
• Improved fuel efficiency and throttle response through optimized combustion
• Reliable cold starting performance in various weather conditions
• OE-quality construction for dependable long-term performance
• 14mm thread diameter with standard reach

DENSO's U-Groove design positions the spark at the optimal location within the combustion chamber, allowing the air-fuel mixture to ignite more efficiently. This results in smoother engine operation, reduced emissions, and better overall engine performance compared to standard spark plugs.