Denso 671-8012 Spark Plug Wire Set

Denso 671-8012 Ignition Wire Set

Denso 671-8012 is a spark plug wire set built to match factory-installed form, fit, color, and performance. It is a direct OE-style replacement for select Chevrolet and GMC trucks, vans, and SUVs from 1987-1993, including Chevrolet Blazer, C1500, K1500, and GMC Jimmy, Yukon, and C/K-series applications.

Key Features

• Silicone spark plug boot material for heat resistance and stable connection performance
• 8mm insulation outside diameter for OE-style routing and fit
• 90-degree spark plug end boot for tight engine bay clearance
• Female spark plug end terminal type and female distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction
• Brand line: Denso First Time Fit focuses on factory-style ignition wire sets that match original fit and performance characteristics

Detailed Description

This Denso First Time Fit ignition wire set is engineered for direct replacement service on 1987-1993 Chevrolet and GMC applications. The 8mm wire design, silicone boot material, and 90-degree spark plug end help maintain secure routing and consistent ignition transfer in vehicles such as the Chevrolet C1500, GMC K2500, and Chevrolet Blazer. Part number 671-8012 is also referenced by several aftermarket catalogs for the same application, including NAPA Mileage Plus 6718012 and Bosch 09649.

Use this ignition wire set when you need OE-style replacement performance for aging ignition components on classic GM trucks, vans, and SUVs. The factory-style construction supports proper fit at the distributor or coil end and at the spark plug end, helping preserve ignition system integrity on compatible Chevrolet and GMC models.

What It Helps Solve

• 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
• Voltage leakage from cracked or aged ignition leads
• Poor routing or clearance issues in tight engine compartments

Installation Notes and Tips

Verify engine-specific routing before removal so each lead returns to the correct cylinder and distributor location. Inspect plug towers, distributor cap terminals, and coil connections for corrosion or carbon tracking before installing the new set. Confirm the 90-degree spark plug boot clears nearby components and follows the original wire path on Chevrolet and GMC C/K-series, Blazer, and Jimmy applications.

Quality Assurance

Denso First Time Fit ignition wire sets are built to match original equipment form and performance expectations, with construction that meets or exceeds OE/OES standards. Part number 671-8012 is a direct-fit ignition wire set for the listed Chevrolet and GMC applications.