Denso 671-8094 Spark Plug Wire Set

Denso 8mm Spark Plug Wire Set for Ford Applications

Denso 671-8094 is an 8mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct replacement for select Ford, Lincoln, and Mercury vehicles from the late 1970s and mid-1970s, including Ford Bronco, F-100, F-150, F-250, F-350, LTD, Thunderbird, and related models.

The Denso First Time Fit line focuses on OE-style replacement details, making this part a practical choice for restoring ignition performance on classic Ford truck and car applications. If you are searching for a Denso 671-8094 spark plug wire set for a 1977-1979 Ford F-150 or a 1975-1978 Ford LTD, this part is built around those factory requirements.

Key Features

• 8mm insulation outside diameter for OE-style wire routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• Female spark plug end terminal type
• 180-degree spark plug end boot design for specific routing needs
• Distributor coil end terminal type: female
• Built to meet or exceed OE/OES standards in construction
• Direct replacement for select Ford, Lincoln, and Mercury ignition systems

Product Details

Denso 671-8094 is part of the First Time Fit ignition wire set line, which is engineered to mirror the original wire set configuration used by the vehicle manufacturer. That means the wire set is specified for correct fitment, terminal style, boot angle, and insulation size, helping maintain proper ignition routing on compatible classic vehicles. This part cross-references Bosch 09620 and NAPA Mileage Plus 6718094 for the same application.

Compatible With 1977-1979 Ford Bronco, 1977-1979 Ford E-100 Econoline, 1977-1979 Ford E-100 Econoline Club Wagon, 1977-1979 Ford E-150 Econoline, 1977-1979 Ford E-150 Econoline Club Wagon, 1977-1979 Ford E-250 Econoline, 1977-1979 Ford E-250 Econoline Club Wagon, 1977-1979 Ford E-350 Econoline, 1977-1979 Ford E-350 Econoline Club Wagon, 1977-1979 Ford F-100, 1977-1979 Ford F-150, 1977-1979 Ford F-250, 1977-1979 Ford F-350, 1977-1979 Ford Thunderbird, 1977-1979 Lincoln Continental, 1977-1979 Mercury Cougar, 1975-1978 Ford LTD, 1977-1978 Mercury Grand Marquis, and 1977-1978 Mercury Marquis.

Common Issues This Part May Address

• Misfires caused by worn or deteriorated ignition wires
• Hard starting from weak spark delivery
• Rough idle related to damaged wire insulation or terminals
• Intermittent ignition performance from cracked boots or poor connections
• Routing problems when replacing non-OE-style wire sets

Installation Notes

Verify engine application, distributor connection style, and boot angle before installation. Route each wire to match the original layout and keep the wires separated from hot exhaust components and sharp edges. For best results, compare the existing wire set to the new Denso 671-8094 set before removal so each lead can be transferred in the correct order.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to match factory-installed wire sets and that their construction meets or exceeds OE/OES standards. The 8mm design, silicone boots, and OE-style terminal configuration support consistent replacement quality for compatible Ford, Lincoln, and Mercury ignition systems.