Denso 671-8020 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set 671-8020

Denso First Time Fit ignition wire sets are built to match factory-installed wire sets in form, fit, color, and performance. This 7mm spark plug wire set uses silicone spark plug boots and OE-style terminal configurations for direct replacement service on select Cadillac, Buick, Chevrolet, Oldsmobile, and Pontiac applications.

Key Features

• 7.00 mm insulation outside diameter for OE-style ignition wire routing
• Silicone spark plug boot material for heat resistance and durability
• Female distributor coil end terminal type
• 90-degree spark plug end boots for routed plug access
• OE-style fit and performance for factory replacement service
• Compatible with select 1989-1994 Cadillac, Buick, Chevrolet, Oldsmobile, and Pontiac vehicles

Product Details

The Denso 671-8020 spark plug wire set is part of the First Time Fit line, which focuses on direct replacement ignition components that mirror original equipment dimensions and connection styles. The 7mm wire construction, silicone boot material, and female terminal ends support consistent ignition routing and secure connections on applications such as the 1989-1993 Chevrolet Caprice, 1989-1992 Chevrolet Camaro, and 1989-1992 Pontiac Firebird. It also cross-references NAPA Mileage Plus 6718020 for the same application.

Use this Denso 7mm wire set when servicing ignition systems that require OE-style wire length, boot angle, and terminal fitment. The part number 671-8020 is also a useful reference when verifying replacement ignition wire sets for Cadillac Commercial Chassis, Buick Roadmaster, and Oldsmobile Custom Cruiser applications.

Vehicle Fitment

• Fits 1992-1994 Cadillac Commercial Chassis, N/A
• Fits 1991-1993 Buick Roadmaster, N/A
• Fits 1993 Cadillac Fleetwood, N/A
• Fits 1989-1993 Chevrolet Caprice, N/A
• Fits 1990-1992 Cadillac Brougham, N/A
• Fits 1989-1992 Chevrolet Camaro, N/A
• Fits 1991-1992 Oldsmobile Custom Cruiser, N/A
• Fits 1989-1992 Pontiac Firebird, N/A

Common Issues This Part Can Address

• Cracked or heat-damaged spark plug wire insulation
• Loose or worn terminal connections at the coil or spark plug
• Misfire concerns caused by deteriorated ignition wires
• Hard starting related to weak spark delivery
• Routing problems from incorrect wire length or boot angle

Installation Notes and Tips

Match each wire to the original routing before removal to preserve firing order and clearance around hot or moving engine components. Confirm the female coil-end terminal style and 90-degree spark plug boot orientation before installation. Verify application by year, make, and model, and compare the existing wire set to part number 671-8020 before service.

Quality Assurance

Denso First Time Fit ignition wire sets are engineered to meet or exceed OE/OES standards in construction and performance. The 671-8020 is built as a direct replacement option for factory-style ignition service on select Cadillac, Buick, Chevrolet, Oldsmobile, and Pontiac vehicles.