The DENSO Iridium IW27 Spark Plug, manufacturer part number 5317 and vendor part number 5317, is engineered for high-performance ignition applications that demand dependable spark delivery and long-lasting electrode durability. Its iridium construction withstands temperatures up to 4,000°F, helping the plug maintain performance under severe operating conditions. The fine iridium center electrode supports lower voltage requirements while promoting reliable ignition and efficient firing performance.
Designed for applications specified for the DENSO IW27 model, this spark plug uses 360° laser welding around the electrode to create a durable seal that resists wear in demanding environments. The tapered-cut ground electrode and U-groove create a larger flame-center area, supporting consistent flame development and dependable combustion. These design features make the plug suitable for performance-focused engines and replacement applications requiring the DENSO IW27 specification.
Verify vehicle or equipment fitment before installation, including engine application, heat range, thread specification, and ignition system requirements. The DENSO Iridium IW27 Spark Plug is supplied under brand DENSO and is identified by manufacturer and vendor part number 5317.
Features:
- Brand: DENSO
- Model: IW27
- Manufacturer Part Number: 5317
- Vendor Part Number: 5317
- Spark Plug Type: Iridium
- Temperature Resistance: Withstands temperatures up to 4,000°F
- Center Electrode: Fine iridium electrode helps reduce voltage requirements and improve firing performance
- Electrode Welding: 360° laser-welded electrode provides a durable, wear-resistant seal
- Ground Electrode: Tapered-cut design with U-groove supports a larger flame-center area
- Fitment: For applications requiring the DENSO IW27 spark plug specification; verify vehicle or equipment compatibility before installation