The DENSO IX27 Iridium Spark Plug, manufacturer part number 5373 and vendor part number 5373, is engineered to deliver dependable ignition performance in demanding engine applications. Its fine iridium center electrode supports lower voltage requirements while promoting consistent spark formation, helping improve starting, throttle response, and overall combustion efficiency. The IX27 model is designed for engines that require a durable, high-performance spark plug with reliable heat resistance.
Iridium is exceptionally resistant to erosion and can withstand temperatures up to 4,000°F, helping the electrode maintain its shape over extended service intervals. DENSO’s 0.016-inch iridium electrode is produced with 360-degree laser welding to create a secure seal that resists wear under severe operating conditions. This construction supports long-term performance in high-temperature and high-load environments.
The ground electrode features a tapered cut and U-groove design that creates a larger volume area around the flame center. This configuration helps promote efficient flame development and stable ignition across a broad range of operating conditions. The DENSO IX27 fits applications specified for this model and part number; always verify vehicle, engine, thread, reach, heat range, and manufacturer application requirements before installation. This spark plug is supplied as an individual replacement component.
Features:
- Brand: DENSO
- Model: IX27
- Manufacturer Part Number: 5373
- Vendor Part Number: 5373
- Electrode Material: Iridium for high-temperature durability and reduced wear
- Operating Temperature Resistance: Withstands temperatures up to 4,000°F
- Center Electrode: 0.016-inch fine-wire design helps reduce required firing voltage
- Welding Construction: 360-degree laser-welded electrode seal resists wear
- Ground Electrode: Tapered cut and U-groove support stable flame development
- Fitment: For vehicle and engine applications specified for DENSO IX27 part number 5373; verify application before installation