Denso 5752 Spark Plug

Denso Iridium Racing Spark Plug for RX-8 Trailing Use

Denso Iridium Racing 5752 is a race-focused spark plug built for demanding ignition setups that need stable firing under high load. It is listed for 2004-2011 Mazda RX-8 trailing applications and is a direct fit for enthusiasts searching for a Denso RX-8 trailing spark plug with Iridium Racing construction.

Key Features

• Iridium center electrode tip for precise spark delivery
• Full platinum ground electrode tip design for durability
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode core material
• 5000 ohm resistance
• Pre-gapped to 1.1 mm
• 14.00 mm thread diameter, 19.00 mm reach, flat seat
• Manufacturer heat range 31
• Single ground electrode with slant configuration

Iridium Racing Product Line

Denso Iridium Racing plugs are positioned for serious performance use where ignition consistency matters. Part number 5752 combines an iridium firing tip with a platinum-tipped ground electrode and a copper-core design to support controlled combustion in high-demand conditions. For buyers comparing Denso 5752 against other race spark plug options, this Iridium Racing line is aimed at applications that require a more specialized plug specification than standard replacement parts.

Detailed Description

This spark plug is engineered for the trailing position on 2004-2011 Mazda RX-8 models and is also referenced under Denso Auto Parts IRT01-31. The 20.6 mm hex size, flat seat, and 19.00 mm reach are important fitment details for RX-8 owners looking for the correct Denso 5752 spark plug. If you are searching for a Mazda RX-8 trailing spark plug, Denso Iridium Racing 5752 matches the listed application and specification set.

Common Issues This Part Can Address

• Misfire caused by worn or heat-stressed spark plug electrodes
• Hard starting from degraded ignition performance
• Rough idle related to inconsistent spark delivery
• Loss of throttle response from an aging trailing plug
• Combustion instability in high-load rotary engine operation

Installation Notes and Tips

Verify the trailing plug position before installation on the Mazda RX-8, since this part is listed specifically for trailing use. Confirm thread diameter, reach, seat type, and heat range against the vehicle specification before service. Use proper spark plug handling practices to avoid damaging the iridium tip or altering the pre-gap setting.

Quality Assurance

Denso manufactures this Iridium Racing spark plug to published dimensional and material specifications for the listed application. Cross-reference part number: Denso Auto Parts IRT01-31.