Denso 4116 Spark Plug

Overview of Denso 4116 Spark Plug for Ferrari and Lamborghini

The Denso 4116 spark plug is engineered for high-performance vehicles such as the Ferrari 348 GTS, 348 TS, Testarossa, and Lamborghini Diablo, Mondial 3.2, and Mondial t. Designed to deliver reliable ignition and consistent performance, this spark plug supports optimal engine operation in these specific models.

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground and center electrode tips with copper core for efficient conductivity
• Standard ground configuration with a single ground electrode
• Flat seat type with 19.00 mm reach and 12.00 mm thread diameter
• Pre-gap size of 0.7 mm and manufacturer heat range of 27
• 18.0 mm hex size for standard installation tools
• Resistance rating of 5000 ohms to reduce electrical noise

Detailed Features and Specifications

The Denso 4116 spark plug features a U-groove ground electrode tip design that enhances spark exposure to the air-fuel mixture, promoting efficient combustion. The ground electrode and center electrode tips are made of nickel, while the center electrode core is copper, providing a balance of durability and excellent thermal conductivity. The single ground electrode with a standard configuration ensures consistent spark delivery. With a flat seat type and a reach of 19.00 mm, this spark plug fits securely in the combustion chamber of compatible Ferrari and Lamborghini models. The pre-gap size of 0.7 mm is optimized for these engines, and the manufacturer heat range of 27 supports stable operation under various driving conditions. Additionally, the 5000 ohm resistance helps minimize electromagnetic interference with vehicle electronics.

About the U-Groove Conventional Product Line

The Denso U-Groove Conventional line focuses on spark plugs with a unique U-groove ground electrode tip design. This design improves spark exposure and combustion efficiency compared to traditional flat or tapered electrodes. The conventional construction ensures compatibility with a wide range of engines while providing reliable ignition performance. The 4116 part number within this line is tailored for high-performance European sports cars, combining proven materials like nickel and copper to meet specific engine requirements.

Applications and Common Issues Addressed

• Compatible with Ferrari 348 GTS, 348 TS, Testarossa, and Lamborghini Diablo, Mondial 3.2, Mondial t models
• Helps resolve misfires caused by worn or damaged spark plugs
• Improves cold start performance and throttle response
• Reduces electromagnetic interference affecting vehicle electronics
• Supports consistent combustion for smoother engine operation

Installation Notes and Tips

• Use an 18.0 mm socket wrench for proper installation
• Ensure the spark plug gap is set to 0.7 mm before installation if adjustment is needed
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to avoid damage to the flat seat
• Inspect ignition components for wear during replacement

Quality Assurance and Warranty

Denso spark plugs, including the 4116 part number, are manufactured to meet strict quality standards for durability and performance. The use of nickel and copper materials ensures reliable conductivity and heat dissipation. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support their use in high-performance vehicles such as Ferrari and Lamborghini models.