Denso 671-4009 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set for OE Fit

Denso 671-4009 is a 7mm spark plug wire set built to match factory-installed form, fit, color, and performance. It is a direct replacement for select Mitsubishi, Hyundai, Dodge, and Plymouth applications, including Mitsubishi Mighty Max, Eclipse, Galant, and Hyundai Sonata models.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing and fit
• Silicone spark plug boot material for heat resistance and durability
• 110-degree spark plug end boot angle for specified engine layouts
• Female spark plug end terminal type with male distributor/coil end terminal
• Built to meet or exceed OE/OES standards in construction and performance
• Compatible with select 1986-1996 Mitsubishi, Hyundai, Dodge, and Plymouth vehicles

Product Details

This Denso First Time Fit ignition wire set is engineered as an OE-style replacement for vehicles that require a 7mm ignition wire design. The silicone boots help maintain a secure connection at the spark plug end, while the 110-degree boot angle supports proper wire routing in tighter engine bays. Part number 671-4009 is listed for applications such as Mitsubishi Mighty Max, Mitsubishi Eclipse, Mitsubishi Galant, Hyundai Excel, Hyundai Sonata, Dodge Ram 50, and Plymouth Laser. This part cross-references NGK (e.g., ME51, ME54) for the same application.

What It Helps Address

• Misfires caused by worn or heat-damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from inconsistent ignition transfer
• Voltage leakage from cracked or deteriorated wire insulation
• Poor engine performance in aging ignition systems

Installation Notes and Tips

Verify engine application, wire routing, and terminal style before installation. Match the 7mm specification, female spark plug end, and male distributor/coil end to the original setup. For best results, route the wires away from hot exhaust components and follow the factory path to reduce crossfire and abrasion. Confirm fitment carefully on Mitsubishi Mighty Max, Mitsubishi Eclipse, and Hyundai Sonata applications, since year and build-date notes vary by vehicle.

Quality Assurance

Denso First Time Fit ignition wire sets are produced to align with factory-installed specifications and are built to meet or exceed OE/OES standards for form, fit, color, and performance.