Denso 671-6031 Spark Plug Wire Set

Denso 671-6031 Ignition Wire Set

Denso 671-6031 is a spark plug wire set built to match factory-installed form, fit, color, and performance. It is a direct OE-style ignition wire replacement for select Pontiac Firebird and Buick Regal applications, with 8mm insulation and silicone spark plug boots for dependable ignition routing.

Key Features

• 8mm ignition wire set for OE-style replacement
• Silicone spark plug boot material for heat resistance and flexibility
• Female distributor coil end terminal type
• 180-degree spark plug end boot design
• Female spark plug end terminal type
• Built to meet or exceed OE/OES standards
• Compatible With 1989 Pontiac Firebird, N/A
• Compatible With 1986-1987 Buick Regal, N/A

Product Details

The Denso First Time Fit product line is engineered to mirror the original wire set in form, fit, color, and performance. Part number 671-6031 uses 8.00mm outside diameter insulation and silicone boots to support stable routing and consistent connection at the spark plug and coil ends. This part cross-references NAPA Mileage Plus 6716031 for the same application.

For buyers searching for a 1989 Pontiac Firebird spark plug wire set or an 1986-1987 Buick Regal ignition wire replacement, this Denso set provides a direct-fit solution that follows OE/OES standards. The 671-6031 part number is also a useful reference when matching ignition wire sets by application.

Common Issues This Part Can Address

• Cracked or heat-damaged ignition wire insulation
• Loose or worn spark plug boot connections
• Misfire caused by deteriorated wire routing or terminal wear
• Hard starting related to weak ignition transfer
• Intermittent ignition performance from aged factory wires

Installation Notes and Tips

Match each wire to the original routing before removal to preserve firing order and clearance around hot engine components. Confirm the female terminal ends and 180-degree spark plug boot orientation before installation. For best results, inspect the distributor cap, coil connection, and spark plugs at the same time so the new wire set is installed against clean, serviceable ignition components.

Quality Assurance

Denso states that First Time Fit ignition wire sets are built to OE/OES standards and are intended to replicate the original factory wire set in fit and performance. Part number 671-6031 is manufactured as an OE-style replacement for the listed Pontiac Firebird and Buick Regal applications.