Denso 671-8042 Spark Plug Wire Set

Denso 671-8042 Spark Plug Wire Set

Denso 671-8042 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct OE-style ignition wire replacement for classic Chevrolet and GMC applications, including Camaro, El Camino, Nova, Malibu, and G-series vans.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing and fitment
• Silicone spark plug boot material for heat resistance and flexibility
• 90-degree spark plug end boot for tight engine bay routing
• Female spark plug end terminal type with male distributor/coil end terminal
• Built to meet or exceed OE/OES standards in construction
• Compatible With 1964-1970 Chevrolet and GMC applications listed below

Product Details

The Denso First Time Fit line is engineered as a factory-style replacement line for ignition service. This Denso 671-8042 spark plug wire set uses silicone boots and a 7mm insulation diameter to support reliable routing and consistent connection quality on older ignition systems. It is a practical choice for owners servicing a Chevrolet Camaro, El Camino, Nova, or Malibu, as well as GMC G-series vans that require the specified 7mm, non-HEI application.

This part cross-references NAPA Mileage Plus 6718042 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or heat-damaged plug wires
• Hard starting related to weak ignition transfer
• Rough idle from deteriorated wire insulation or boot fit
• Intermittent spark loss from aged terminal connections
• Routing problems on 90-degree spark plug end applications

Installation Notes and Fitment

• Fits 1975 Chevrolet G10, N/A, w/o HEI; 7mm
• Fits 1975 Chevrolet G20, N/A, w/o HEI; 7mm
• Fits 1975 Chevrolet G30, N/A, w/o HEI; 7mm
• Fits 1975 GMC G15, N/A, w/o HEI; 7mm
• Fits 1975 GMC G25, N/A, w/o HEI; 7mm
• Fits 1975 GMC G35, N/A, w/o HEI; 7mm
• Fits 1974 GMC G15/G1500 Van, N/A, 7mm
• Fits 1974 GMC G25/G2500 Van, N/A, 7mm
• Fits 1974 GMC G35/G3500 Van, N/A, 7mm
• Fits 1967-1970 Chevrolet Camaro, N/A, 7mm
• Fits 1968-1970 Chevrolet El Camino, N/A, 7mm
• Fits 1969-1970 Chevrolet Nova, N/A, 7mm
• Fits 1964-1967 Chevrolet Malibu, N/A, 7mm

Verify ignition system type before installation, especially on 1975 Chevrolet and GMC vehicles listed as w/o HEI. Match the wire routing, terminal style, and boot angle to the original setup for proper fit.

Quality Assurance

Denso First Time Fit ignition wire sets are built to OE/OES standards for form and performance consistency. The 671-8042 part number is also listed under several aftermarket cross-references, including ACDelco 508F and Bosch 09655.