Denso 671-8034 Spark Plug Wire Set

Denso 671-8034 Ignition Wire Set

Denso 671-8034 is a spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct replacement for select Chevrolet and GMC applications, including Chevrolet P30 and GMC P3500 models, with OE-style construction for dependable ignition transfer.

Key Features

• Silicone spark plug boot material for heat resistance and flexibility
• 8mm insulation outside diameter for OE-style wire routing and fit
• Female distributor coil end terminal type
• 180-degree spark plug end boot for specific engine bay layouts
• Female spark plug end terminal type
• Built to meet or exceed OE/OES standards
• Brand line: Denso 8mm ignition wire sets are made as First Time Fit replacements for factory-style service

Detailed Description

This Denso spark plug wire set is engineered for direct replacement service on older Chevrolet and GMC trucks and vans that require an 8mm ignition wire configuration. The Denso 671-8034 follows the original wire set layout closely, making it a practical choice for restoring ignition performance on applications such as 1987-1989 Chevrolet P30, 1987-1989 GMC P3500, and 1985-1986 Chevrolet C20 Suburban. This part cross-references Bosch 09656 and NAPA Mileage Plus 6718034 for the same application.

What It Helps Address

• Misfires caused by worn or heat-damaged plug wires
• Hard starting related to weak spark delivery
• Rough idle from inconsistent ignition transfer
• Voltage leakage from cracked insulation or aged boots
• Poor engine performance on aging Chevrolet and GMC ignition systems

Installation Notes and Tips

Verify wire routing, terminal style, and boot angle before installation. This set uses female terminals at the distributor/coil end and female spark plug terminals, with 180-degree spark plug boots and 8mm insulation. Confirm the vehicle’s exact engine and exhaust manifold configuration against the listed fitment before ordering, especially on 1985-1986 Chevrolet and GMC models with stainless steel exhaust manifold notes.

Quality Assurance

Denso First Time Fit ignition wire sets are built to OE/OES standards for form and performance consistency. The 671-8034 is intended as a factory-style replacement for select Chevrolet and GMC applications, with construction designed to match original fitment expectations.