Denso 5754 Spark Plug

High-Performance Spark Plug for Mazda RX-8

The Denso Iridium Racing 5754 spark plug is engineered to deliver reliable ignition performance specifically for the Mazda RX-8. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Full platinum ground electrode tip for extended wear resistance
• Slant ground configuration to optimize spark exposure
• Copper core center electrode for improved conductivity
• Flat seat type with 14mm thread diameter and 21mm reach
• Pre-gap size of 1.1 mm for precise spark gap
• Manufacturer heat range rating of 27 for balanced thermal performance
• Hex size of 20.6 mm for standard installation tools

Detailed Features and Specifications

The Denso Iridium Racing 5754 spark plug incorporates a copper core center electrode with an iridium tip, which provides a stable and efficient spark while maintaining electrode longevity. The ground electrode features a full platinum tip and a nickel core, arranged in a slant configuration to improve spark exposure and combustion efficiency. With a pre-gap size of 1.1 mm and a flat seat design, this spark plug ensures proper sealing and optimal ignition timing. The thread diameter of 14 mm and a reach of 21 mm make it compatible with the Mazda RX-8 engine specifications. The heat range of 27 is calibrated to maintain appropriate operating temperatures under racing or high-performance conditions.

About the Iridium Racing Product Line

Denso's Iridium Racing line focuses on delivering spark plugs that combine iridium's high melting point and durability with advanced electrode designs. This product line is tailored for performance-oriented vehicles like the Mazda RX-8, offering improved ignition stability and electrode life compared to standard plugs. The 5754 part number is part of this series, designed to meet the demands of secondary ignition systems in high-revving engines.

Common Applications and Problem Solving

• Restores consistent ignition in Mazda RX-8 engines experiencing misfires
• Reduces electrode wear in high-performance driving conditions
• Improves throttle response and combustion efficiency
• Addresses issues related to spark plug fouling and poor ignition
• Supports stable engine operation under racing or spirited driving

Installation Notes and Tips

When installing the Denso Iridium Racing 5754 spark plug, ensure the pre-gap of 1.1 mm is maintained for optimal performance. Use a 20.6 mm hex socket for proper torque application. The flat seat design requires careful seating to avoid leaks. It is recommended to follow the Mazda RX-8 manufacturer’s torque specifications and to inspect the spark plug threads for damage before installation.

Quality Assurance and Warranty

Denso manufactures the Iridium Racing 5754 spark plug to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. Always verify warranty terms with the point of purchase or manufacturer documentation.