The DENSO IK20 Iridium Spark Plug is engineered for reliable ignition, efficient combustion, and long-lasting performance in demanding automotive applications. Manufactured by DENSO, this iridium spark plug uses a fine-wire center electrode to help reduce the voltage required for ignition while promoting consistent firing performance. The IK20 model and manufacturer part number 5304 make it easier to identify the correct replacement for compatible vehicles and engines.
Iridium is significantly harder and more heat-resistant than platinum, allowing the electrode to withstand temperatures up to 4,000°F. The fine 0.4 mm electrode design supports a concentrated spark and improved ignition response. DENSO’s 360-degree laser-welded electrode construction creates a durable seal designed to resist wear under severe operating conditions, helping maintain dependable performance over an extended service interval.
The ground electrode features a tapered cut and U-groove design that creates a larger volume area around the center of the flame. This configuration promotes efficient flame development and supports stable combustion across a wide range of engine operating conditions. Use the DENSO IK20 Iridium Spark Plug as a direct replacement only when the application’s required heat range, thread specifications, reach, and gap match the vehicle or engine manufacturer’s recommendations. Verify fitment before installation.
Features:
- Iridium Construction: Uses a durable iridium electrode material designed to withstand temperatures up to 4,000°F.
- Fine-Wire Electrode: The 0.4 mm center electrode helps reduce voltage requirements and supports reliable firing.
- Laser-Welded Seal: 360-degree laser welding helps resist electrode wear in demanding operating conditions.
- Tapered Ground Electrode: Tapered-cut and U-groove design creates a larger flame-center area for efficient combustion.
- Application Fitment: Designed for compatible automotive and engine applications requiring the DENSO IK20 specification; verify vehicle fitment before installation.
- Brand and Part Number: DENSO IK20 model, manufacturer part number 5304, vendor part number 5304.