Denso 671-8081 Spark Plug Wire Set

Denso 671-8081 Ignition Wire Set

Denso First Time Fit ignition wire sets are built to match factory-installed wire sets in form, fit, color, and performance. This Denso 8mm spark plug wire set uses silicone spark plug boot material and OE-style terminal configurations for a direct replacement on select Ford, Lincoln, and Mercury applications.

Key Features

• 8mm insulation outside diameter for OE-style ignition wire routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 115-degree spark plug end boot angle for proper clearance in tight engine bays
• Female spark plug end terminal type and female distributor/coil end terminal type
• Built to meet or exceed OE/OES standards for form and performance
• Compatible with select Ford F-150, Ford F-250, Ford F-350, and Ford LTD applications

Detailed Description

The Denso 671-8081 spark plug wire set is a direct-fit ignition wire replacement for select 1977-1982 Ford E-Series vans and wagons, plus 1977-1979 Ford F-Series trucks, 1977-1978 Ford LTD, 1977-1978 Lincoln Continental, and 1977-1978 Mercury Grand Marquis and Marquis applications. As part of Denso’s First Time Fit line, this 8mm wire set is engineered to mirror the original wire set’s dimensions and connection style for consistent installation and dependable ignition system service. This part number, 671-8081, is a practical OE-style replacement for vehicles that require female terminals and a 115-degree spark plug boot angle.

This part cross-references NAPA Mileage Plus 6718081 and Wells QW837 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or heat-damaged plug wires
• Hard starting related to weak ignition wire insulation
• Rough idle from inconsistent spark delivery
• Voltage leakage from cracked or deteriorated wire boots
• Poor terminal contact at the spark plug or distributor/coil end

Installation Notes and Tips

Verify engine application and wire routing before installation. Match each lead to the original routing path to avoid crossfire, heat exposure, or interference with moving components. Confirm the female terminal ends and 115-degree spark plug boot orientation before final connection. For best results, inspect spark plugs, distributor cap, and coil components at the same time.

Quality Assurance

Denso First Time Fit ignition wire sets are manufactured to meet or exceed OE/OES standards and are intended to replicate factory fit and performance characteristics for the listed applications.