Denso Iridium Power Spark Plug IW16 – 14mm, Resistor, Gasket Seat

PRODUCT OVERVIEW

The Denso Iridium Power Spark Plug IW16 is engineered for reliable ignition performance and long service life. Featuring a 0.4mm fine-wire iridium center electrode and nickel ground electrode with U-groove design, it delivers strong spark efficiency, improved combustion and consistent operation over extended mileage.

KEY FEATURES & BENEFITS

• Fine-wire 0.4mm iridium center electrode for high ignitability and stable spark.
• Nickel U-groove ground electrode optimises flame kernel growth and combustion.
• Projected tip design aids cold starting and efficient burn.
• Built-in resistor (5K Ohm) helps reduce radio frequency interference.
• Durable construction for long service life and consistent performance.

TECHNICAL SPECIFICATIONS

• Part Number: IW16
• Heat Range: 16
• Thread Size: 14mm
• Thread Pitch: 1.25mm
• Reach: 19mm (3/4")
• Hex Size: 16mm (5/8")
• Seat Type: Gasket
• Terminal Type: Solid
• Gap (Isogap): 1.1mm (0.043")
• Center Electrode Material: Iridium, 0.4mm fine wire
• Ground Electrode Material: Nickel
• Electrode Design: U-groove, taper cut
• Projection: Projected
• Resistor: Yes, 5K Ohm
• Longevity: Up to 50,000km (approximate, application dependent)
• Quantity: 1 spark plug

TORQUE INFORMATION

• Cast Iron Cylinder Head: 26–30 lb.ft
• Aluminum Cylinder Head: 15–22 lb.ft

INSTALLATION NOTES

• Always confirm compatibility with your specific vehicle before installation.
• Check and adjust spark plug gap only if specified by the vehicle manufacturer.
• Use a calibrated torque wrench and follow recommended torque values for the cylinder head material.