Denso 671-8173 Spark Plug Wire Set

Denso 8mm Spark Plug Wire Set for Ford Trucks

Denso 671-8173 is an 8mm spark plug wire set built to match the form, fit, color, and performance of the original factory wire set. It is a direct OE-style ignition wire replacement for Ford F-150, Ford F-250 Super Duty, and Ford F-350 Super Duty applications listed below.

Key Features

• 8.00 mm insulation outside diameter for OE-style ignition wire construction
• Silicone spark plug boot material for heat resistance and durability
• 180-degree spark plug end boot for the listed applications
• Female spark plug end terminal type
• Male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction and performance
• Part number 671-8173 for accurate ordering and catalog lookup

Product Details

The Denso First Time Fit line focuses on direct replacement ignition components that mirror the original equipment setup. This spark plug wire set is engineered for Ford ignition systems that use an 8mm wire specification, with silicone boots and OE-style terminal ends to support consistent spark delivery. For buyers searching for a Ford F-150 spark plug wire set, Ford F-250 Super Duty ignition wires, or Ford F-350 Super Duty replacement plug wires, Denso 671-8173 provides a catalog-matched solution.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 2010-2014 Ford F-150, N/A, 8mm
• Fits 2011-2015 Ford F-250 Super Duty, N/A, 8mm
• Fits 2011-2015 Ford F-350 Super Duty, N/A, 8mm

Common Issues This Part Can Address

• Misfires caused by worn or heat-damaged ignition wires
• Hard starting related to weak spark transfer
• Rough idle from deteriorated wire insulation or boot wear
• Voltage leakage from cracked or aged plug wire insulation
• Intermittent ignition performance from loose or degraded terminal connections

Installation Notes and Tips

Verify engine application and wire routing before installation. Match each lead to the correct cylinder and confirm the 180-degree spark plug boot orientation and male/female terminal ends align with the factory ignition layout. Inspect coil and plug connections for corrosion or carbon tracking before installing the new set.

Quality Assurance

Denso First Time Fit ignition wire sets are built to OE/OES-level construction standards and are intended to replicate the original factory fit and performance profile. Part number 671-8173 is cataloged for the listed Ford applications and the Denso 8mm product line.