Denso 5752 Spark Plug

High-Performance Spark Plug for Mazda RX-8

The Denso Iridium Racing 5752 spark plug is engineered to deliver reliable ignition performance for Mazda RX-8 vehicles. 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 with a single ground electrode
• Copper core center electrode for optimal conductivity
• Pre-gap size of 1.1 mm for precise spark delivery
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 20.6 mm for standard installation tools
• Manufacturer heat range rating of 31 for balanced thermal performance
• Resistance of 5000 ohms to reduce electrical noise interference

Detailed Spark Plug Specifications and Features

The Denso Iridium Racing 5752 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 slant configuration, designed to improve spark exposure and reduce electrode wear. With a pre-gap size of 1.1 mm, this spark plug ensures optimal ignition timing and combustion efficiency. The flat seat design and 14 mm thread diameter with a 19 mm reach make it compatible with the Mazda RX-8 engine specifications. Additionally, the 5000 ohm resistance helps minimize electromagnetic interference, supporting reliable engine management system operation.

About the Iridium Racing Product Line

The Iridium Racing line from Denso focuses on delivering spark plugs that combine iridium and platinum electrode technology for enhanced durability and consistent ignition performance. This product line is tailored for performance-oriented applications, providing improved wear resistance and stable spark characteristics under demanding conditions. The 5752 spark plug exemplifies these qualities, making it suitable for vehicles like the Mazda RX-8 that require precise ignition components.

Common Applications and Problem Solving

• Replacement for worn or fouled spark plugs in Mazda RX-8 engines
• Improves ignition stability and combustion efficiency
• Reduces misfires and rough idling issues
• Helps maintain engine performance under high load or racing conditions
• Minimizes electrical interference affecting engine sensors

Installation Notes and Tips

When installing the Denso Iridium Racing 5752 spark plug, ensure the pre-gap is set to 1.1 mm if adjustment is necessary. Use a 20.6 mm socket for proper tightening torque to avoid damage to the electrode or threads. The flat seat design requires correct seating to prevent compression leaks. It is recommended to replace spark plugs in sets to maintain consistent engine performance. Always follow the Mazda RX-8 manufacturer’s service guidelines for spark plug replacement intervals.

Quality Assurance and Warranty

Denso manufactures the Iridium Racing 5752 spark plug to meet strict quality standards, ensuring reliable performance and durability. The use of premium materials such as iridium and platinum electrodes contributes to extended service life. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects. Consult product documentation or authorized sources for exact warranty terms.