Denso 671-8071 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set for Cadillac

The Denso First Time Fit ignition wire set is built to match the form, fit, color, and performance of the original factory wire set. This Denso 671-8071 spark plug wire set uses silicone boot material and OE-style terminal configurations for dependable ignition service on classic Cadillac applications.

Key Features

• 7mm ignition wire set for OE-style replacement
• Silicone spark plug boot material for heat resistance and flexibility
• 135-degree spark plug end boot design for routed applications
• Female spark plug end terminal type with male distributor/coil end terminal type
• 7.00 outside diameter insulation
• Built to meet or exceed OE/OES standards
• Direct-fit replacement for Cadillac DeVille, Fleetwood, and Eldorado applications

Product Details

Denso First Time Fit ignition wire sets are engineered to mirror the original equipment wire set in appearance and performance. The 7mm construction and silicone boot material support consistent ignition routing and connection integrity, while the OE-style terminal layout helps maintain the factory configuration. Part number 671-8071 is a practical choice for owners servicing classic Cadillac ignition systems, including Cadillac DeVille, Cadillac Fleetwood, and Cadillac Eldorado models from the 1960s and early 1970s.

This part cross-references ACDelco 508D and Autolite 96074 for the same application.

Vehicle Fitment

• Fits 1963-1970 Cadillac DeVille, N/A, 7mm
• Fits 1965-1970 Cadillac Fleetwood, N/A, 7mm
• Fits 1963-1969 Cadillac Eldorado, N/A, 7mm

Common Issues This Part Can Address

• Cracked or heat-damaged spark plug wire insulation
• Loose or worn ignition wire terminal connections
• Misfire caused by deteriorated wire routing or boot fitment
• Hard starting related to aging ignition wire components
• Voltage leakage from worn high-tension ignition wires

Installation Notes and Tips

Match each wire to the original routing before removal to preserve firing order and clearance around hot or moving components. Confirm the 135-degree spark plug boot orientation and the female spark plug terminal type before installation. For best results, inspect distributor cap, coil connections, and spark plugs at the same time to avoid repeat ignition service.

Quality Assurance

Denso First Time Fit wire sets are manufactured to OE/OES-level standards for form, fit, color, and performance. The Denso 671-8071 is designed as an OE-style replacement for classic Cadillac ignition service.