Denso 5702 Spark Plug

Denso Iridium Racing Spark Plug 5702

Denso Iridium Racing 5702 is a race-focused spark plug built for serious enthusiasts who want precise ignition performance from a compact, high-spec design. It uses an iridium center electrode, a platinum ground electrode tip, and a copper core to support stable spark delivery under demanding conditions.

For drivers searching for a Denso spark plug for performance ignition service, Part Number 5702 delivers a 14.0 mm thread diameter, 19.00 mm reach, flat seat, and 0.7 pre-gap size. The 5000 ohm resistor helps control electrical noise in ignition systems where clean signal management matters.

Key Features

• Denso Iridium Racing line for motorsport-oriented ignition service
• Iridium center electrode tip material for focused spark delivery
• Full platinum ground electrode tip design with slant ground configuration
• Copper center electrode core and nickel ground electrode core
• 5000 ohm resistance for reduced electrical interference
• 14.00 mm thread diameter, 19.00 mm reach, and flat seat design
• Manufacturer heat range 27 with a 0.7 pre-gap size
• Cross-reference: DENSO Auto Parts IK01-27

Product Details

The Denso Iridium Racing product line is aimed at performance applications where ignition consistency and electrode durability are important. Part Number 5702 combines an iridium center electrode with a platinum-tipped ground electrode to support efficient spark transfer, while the slant ground configuration helps maintain a compact firing profile. This spark plug is a direct technical match for buyers comparing Denso 5702 against IK01-27 references and looking for a race spark plug with OE-style dimensional details.

Searches for Denso 5702, Denso Iridium Racing spark plug, and performance spark plug for ignition service often point to this type of specification set. It is also relevant for vehicle owners researching Denso spark plug replacement options for Honda Civic and similar applications where the correct thread, reach, seat type, and heat range must match the engine requirements.

Common Issues This Part Can Address

• Weak or inconsistent spark output
• Ignition noise affecting sensitive electrical systems
• Misfire concerns tied to worn plug electrodes
• Performance loss from incorrect heat range selection
• Fitment problems caused by mismatched thread diameter, reach, or seat type

Installation Notes and Tips

Verify the engine’s required thread diameter, reach, seat type, heat range, and pre-gap before installation. Use the specified gap setting for the application and inspect the ignition system, coil condition, and plug wires or boots during service. For Honda Civic and other vehicle-specific searches, confirm the engine code and factory plug specification before replacing Denso 5702.

Quality Assurance

Denso manufactures this Iridium Racing spark plug to defined dimensional and material specifications for performance ignition service. Part Number 5702 is built with iridium, platinum, copper, and nickel construction details that support consistent plug geometry and repeatable installation characteristics.