4 Pack Denso 5378 Iridium Power Spark Plugs IWF20 ps

The Denso 5378 Iridium Power Spark Plug (IWF20) is designed for compact engine applications requiring strong ignition performance in tight spaces. Featuring a fine-wire iridium electrode and 10mm thread size, it ensures reliable spark, enhanced combustion efficiency, and long-term durability—perfect for motorcycles, scooters, and small displacement engines.

Features & Benefits:

🔧 Slim-profile iridium tip delivers high-energy spark
🔧 Ideal for motorcycles and compact engine layouts
🔧 Resists fouling and supports consistent performance
🔧 Pre-gapped for quick, accurate installation

Specifications:

Brand & Part Number: Denso 5378 (IWF20)
Material: Iridium
Thread Size: 10mm
Reach: 19mm (0.75 in)
Hex Size: 14mm
Heat Range: 20
Seat Type: Gasket
Resistor: Yes
Gap: 0.6mm (0.024 in)

Equip your small engine with the Denso IWF20 Iridium Power plug—engineered for efficient combustion and lasting reliability!