Denso 5701 Spark Plug

Denso Iridium Racing 5701 Spark Plug

Denso Iridium Racing 5701 is a race-focused spark plug built for serious performance applications that demand stable ignition under demanding conditions. It combines an iridium center electrode with a platinum ground electrode tip and a 0.6 mm pre-gap for precise spark delivery.

For drivers searching for a Denso spark plug for Honda Civic or Acura Integra performance builds, this Iridium Racing design brings a technical electrode package and a 14 mm thread diameter with a flat seat for the specified applications.

Key Features

• Iridium center electrode tip material for fine-wire spark delivery
• Full platinum ground electrode tip design for durability at the firing end
• 0.6 mm pre-gap size for a performance-oriented ignition setup
• 5000 ohm resistance for controlled electrical suppression
• Single slant ground configuration with nickel ground electrode core material
• Copper center electrode core material for efficient heat transfer
• 14.00 mm thread diameter, 19.00 mm reach, and flat seat type
• Manufacturer heat range 24 for specified engine requirements
• 16.0 mm hex size for proper service tool engagement

Iridium Racing Product Line

Denso Iridium Racing plugs are positioned for high-output and motorsport-oriented engines where ignition consistency matters. The 5701 part number reflects a race spark plug specification rather than a general-purpose tune-up plug, making it a focused choice for performance builds that call for this exact heat range and electrode design. The Denso 5701 is also referenced under interchange part number IK01-24.

Detailed Description

This Denso 5701 spark plug uses an iridium center electrode paired with a platinum ground tip to support stable spark formation in demanding combustion environments. The copper core center electrode and nickel ground core help manage heat transfer, while the 5000 ohm resistor design supports ignition system noise control. With a 14 mm thread, 19 mm reach, flat seat, and 16 mm hex, it is built to match the specified engine fitment requirements for performance-oriented service.

Searches for Denso Iridium Racing 5701, Denso 5701 spark plug, and IK01-24 often come from owners maintaining Honda Civic and Acura Integra performance setups that require the correct plug geometry and heat range.

What It Helps Address

• Misfire concerns caused by worn or heat-stressed spark plugs
• Hard starting related to weak ignition output
• Inconsistent combustion under higher-load operation
• Service replacement needs for the specified plug dimensions and heat range
• Ignition performance issues in tuned or motorsport-oriented engines

Installation Notes and Tips

Verify thread diameter, reach, seat type, heat range, and pre-gap before installation. Use the correct spark plug socket for the 16.0 mm hex and confirm the engine calls for a flat-seat plug with a 14.00 mm thread and 19.00 mm reach. Check the vehicle service information for the exact gap specification before final installation.

Compatible With select Honda Civic and Acura Integra applications where the listed plug dimensions and heat range match the engine specification. Fits 2000-2001 Honda Civic, and fits 1994-2001 Acura Integra, where the application calls for this exact plug configuration.

Quality Assurance

Denso manufactures this Iridium Racing spark plug to defined dimensional and electrical specifications for the listed application requirements. The part number 5701 and interchange reference IK01-24 help confirm the correct match during parts lookup and service verification.