Denso 671-6237 Spark Plug Wire Set

Denso 8mm Spark Plug Wire Set for Mustang

Denso First Time Fit ignition wire sets are built to match the factory-installed wire set in form, fit, color, and performance. This Denso 8mm spark plug wire set, part number 671-6237, is made for 2005-2006 Ford Mustang applications and uses OE-style construction for direct replacement service.

Key Features

• Fits 2005-2006 Ford Mustang, N/A
• 8.00 mm insulation outside diameter for OE-style wire routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 120-degree spark plug end boot angle for proper connection clearance
• Female spark plug end terminal type and male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction
• Denso part number 671-6237 for easy identification

Product Details

The Denso 8mm wire set is engineered for drivers replacing worn ignition leads on a 2005-2006 Ford Mustang. The First Time Fit product line focuses on OE-style replacement parts that match factory dimensions and connection style, helping maintain proper ignition routing and dependable electrical transfer. The silicone boot material and 120-degree spark plug end design support secure fitment in tight engine bay layouts, while the 8mm insulation diameter reflects the original-style wire size used for this application. This part cross-references CARQUEST 35-6336 and NAPA Mileage Plus 6716237 for the same application.

Common Issues This Part Can Address

• Cracked or heat-damaged ignition wire insulation
• Loose or worn spark plug boot connections
• Misfire symptoms caused by deteriorated plug wires
• Hard starting related to weak ignition transfer
• Routing or fit problems from non-OE-style replacement wires

Installation Notes and Tips

Verify each wire is routed to the correct cylinder and seated fully at both ends before starting the engine. Match the 120-degree spark plug boot orientation to the original layout on the Mustang to avoid strain on the wire set. Inspect nearby ignition components, including plugs and coil connections, for wear before installation. Confirm fitment by year, make, and model before ordering.

Quality Assurance

Denso First Time Fit ignition wire sets are manufactured to OE-style standards for form, fit, color, and performance. Part number 671-6237 is built as a direct replacement for 2005-2006 Ford Mustang applications.