Denso 5376 Spark Plug

Overview of Denso Iridium Power Spark Plug 5376

The Denso Iridium Power spark plug 5376 is engineered for precision ignition performance in select Ferrari models. Designed to meet the specific requirements of Ferrari 348 GTB, 348 Spider, 348 TB, 512 M, and 512 TR, this spark plug ensures reliable combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Tapercut, u-groove ground electrode tip design for improved spark efficiency
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 0.9 mm for precise spark gap
• Flat seat type with 19.00 mm reach and 12.00 mm thread diameter
• Hex size of 18.0 mm for standard installation tools
• Manufacturer heat range of 24 suitable for high-performance engines
• Resistance rating of 5000 ohms to reduce electrical noise

About the Iridium Power Product Line

The Denso Iridium Power line focuses on delivering spark plugs with iridium-tipped electrodes that provide a balance of durability and efficient ignition. The iridium center electrode tip in part number 5376 offers a fine wire design that supports stable combustion and improved throttle response, making it suitable for high-performance Ferrari engines requiring precise ignition timing and longevity.

Technical Details and Compatibility

This spark plug features a copper core center electrode that enhances thermal conductivity, paired with a nickel ground electrode core for durability. The tapercut, u-groove ground electrode tip design improves spark exposure to the air-fuel mixture, promoting better combustion. With a pre-gap size of 0.9 mm and a flat seat type, the plug fits securely in the combustion chamber. The 19.00 mm reach and 12.00 mm thread diameter are engineered to match the specifications of Ferrari 348 GTB, 348 Spider, 348 TB, 512 M, and 512 TR models, ensuring proper fitment and performance.

Applications and Problem Solving

• Restores consistent ignition in Ferrari 348 GTB and 512 TR engines
• Reduces misfires and rough idling in Ferrari 348 Spider and 512 M
• Improves throttle response and fuel efficiency in Ferrari 348 TB
• Addresses spark plug wear and electrode erosion in high-performance engines
• Minimizes electrical interference with a 5000 ohm resistance rating

Installation Notes and Tips

When installing the Denso Iridium Power spark plug 5376, ensure the pre-gap of 0.9 mm is maintained for optimal performance. Use an 18 mm socket wrench to tighten the plug to the manufacturer’s torque specifications. The flat seat design requires proper seating to avoid compression leaks. It is recommended to inspect the spark plug threads and combustion chamber for debris before installation to ensure a secure fit and reliable ignition.

Quality Assurance and Warranty

Denso manufactures the Iridium Power spark plug 5376 to meet strict quality standards, ensuring durability and consistent performance in Ferrari vehicles. While specific warranty details are not provided, Denso products typically undergo rigorous testing to comply with OEM specifications, offering confidence in their reliability for secondary ignition applications.