Denso 671-8089 Spark Plug Wire Set

Denso 671-8089 Ignition Wire Set

Denso 671-8089 is an 8mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct OE-style replacement for select Ford F-350, E-350 Econoline, E-350 Econoline Club Wagon, F-250, and E-250 Econoline Club Wagon applications.

Key Features

• 8mm insulation outside diameter for OE-style ignition wire routing and fitment
• Silicone spark plug boot material for heat resistance and durability
• Female distributor coil end terminal type
• Female spark plug end terminal type
• 115-degree spark plug end boot angle for proper connection clearance
• Built to meet or exceed OE/OES standards
• Compatible with select Ford truck and van applications from 1987-1997

Product Details

This Denso First Time Fit ignition wire set is engineered as a factory-style replacement for vehicles that require an 8mm wire design. The silicone boots and female terminals support secure electrical connections, while the 115-degree angled spark plug end helps maintain proper routing in tight engine compartments. For buyers searching for a spark plug wire set for Ford F-350 8mm applications or a replacement ignition wire set for Ford E-350 Econoline models, Denso 671-8089 provides an OE-matched solution.

The Denso 8mm product line focuses on direct-fit ignition components that mirror original equipment specifications. That makes this part a practical choice when replacing worn ignition wires on Ford F-250, Ford F-350, and Ford Econoline vans where correct terminal style and boot angle matter. Part number 671-8089 is also a useful reference when cross-shopping ignition wire sets for the same application.

This part cross-references ACDelco 16-818Q and Bosch 09638 for the same application.

What It Helps Address

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

Installation Notes

Verify engine application, terminal style, and boot angle before installation. Route each wire to match the original layout and keep the 8mm wires away from hot or moving components. Confirm the female distributor coil end and female spark plug end connections seat fully before starting the engine.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to match factory-installed parts in form, fit, color, and performance, with construction that meets or exceeds OE/OES standards.

Compatible With

• Fits 1989-1997 Ford F-350, N/A
• Fits 1989-1996 Ford E-350 Econoline, N/A
• Fits 1987 Ford E-350 Econoline, N/A
• Fits 1989-1996 Ford E-350 Econoline Club Wagon, N/A
• Fits 1989-1996 Ford F-250, N/A
• Fits 1989-1991 Ford E-250 Econoline Club Wagon, N/A