Denso 671-8160 Spark Plug Wire Set

Denso 671-8160 Ignition Wire Set

Denso 671-8160 is a 7mm spark plug wire set built to match factory-installed form, fit, color, and performance. It uses silicone spark plug boot material and female terminals for a direct OE-style ignition service part.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire construction
• Silicone spark plug boot material for heat resistance and flexibility
• 90-degree spark plug end boots for tight routing
• Female spark plug end terminal type
• Female distributor/coil end terminal type
• Built to meet or exceed OE/OES standards

Product Details

The Denso First Time Fit line is engineered as an OE replacement for drivers who want the same basic configuration as the original wire set. Part number 671-8160 is listed for 2003-2006 Chevrolet Avalanche 2500, Silverado 2500 HD, and Silverado 3500; 2006 Chevrolet Silverado 3500 and Suburban 2500; 2003-2006 GMC Sierra 2500 HD, Sierra 3500, and Yukon XL 2500; plus 2007 Chevrolet Silverado 2500 HD Classic, Silverado 3500 Classic, and 2007 GMC Sierra 2500 HD Classic and Sierra 3500 Classic. This part cross-references ACDelco 748KK and NGK EUC053 for the same application. If you are searching for a Denso 671-8160 spark plug wire set for a Chevrolet Silverado 2500 HD or GMC Sierra 3500, this OE-style replacement follows the original wire-set layout and terminal style.

Common Problems This Part Addresses

• Misfire caused by worn or damaged ignition wires
• Hard starting related to weak spark delivery
• Rough idle from deteriorated wire insulation or boot condition
• Voltage leakage across aging ignition leads
• Routing issues when replacing a factory-style wire set

Installation Notes

Verify engine application and wire routing before installation. Match each lead to the correct cylinder and confirm the 90-degree spark plug boots seat fully on the plugs. Inspect coil and distributor connections for corrosion or damage before installing the new set. For 2003-2006 Chevrolet Silverado 2500 HD and 2003-2006 GMC Sierra 2500 HD applications, use the vehicle-specific routing path to avoid crossfire and heat exposure.

Quality Assurance

Denso First Time Fit ignition wire sets are built to OE/OES standards for form, fit, color, and performance. The 671-8160 is designed as a factory-style replacement for Chevrolet Silverado, GMC Sierra, and related applications listed above.