DENSO 3178 Standard Spark Plug with U-Groove Ground Electrode

The DENSO 3178 is a standard replacement spark plug engineered to deliver reliable ignition performance across a wide range of gasoline engines. Designed to OEM specifications, this plug meets or exceeds original equipment requirements for a direct, hassle-free installation.

DENSO's proprietary U-Groove ground electrode design exposes more of the spark to the air-fuel mixture, promoting more complete combustion for improved engine efficiency, throttle response, and fuel economy. The nickel alloy construction ensures consistent performance and durability throughout its service life.

Key Features:

• U-Groove Ground Electrode – Enhances ignitability by exposing the spark kernel to the air-fuel mixture
• Nickel Alloy Electrodes – Provide dependable performance and resistance to wear
• OEM-Quality Construction – Manufactured to original equipment specifications for a direct-fit replacement
• Corrugated Ribs on Insulator – Help prevent flashover and improve insulation performance
• Copper Core Center Electrode – Improves heat dissipation for stable operation across varying engine loads
• Standard Heat Range – Suitable for stock, non-modified engine applications

The DENSO 3178 is an ideal choice for routine tune-up maintenance, restoring ignition performance to factory standards. DENSO is a trusted OEM and aftermarket spark plug supplier to major global automakers.