Denso 671-8120 Spark Plug Wire Set

Denso 7mm Spark Plug Wire Set 671-8120

Denso 671-8120 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 select Chrysler and Dodge applications, including Chrysler Imperial, New Yorker, Newport, Town & Country, and Dodge Charger, Monaco, Challenger, and Dart.

Key Features

• 7mm insulation outside diameter for OE-style ignition wire routing and fit
• Silicone spark plug boot material for heat resistance and flexibility
• 90-degree spark plug end boots for tight engine bay routing
• Female spark plug end terminals with male distributor/coil end terminal type
• Built to meet or exceed OE/OES standards in construction
• Direct replacement for select Chrysler and Dodge V8 ignition wire applications

Product Details

The Denso First Time Fit line focuses on restoring original ignition wire set specifications without changing the factory layout. Part number 671-8120 follows OE-style dimensions and terminal configurations, making it a practical choice for owners servicing classic Chrysler Imperial and New Yorker models or Dodge Charger, Challenger, and Dart applications that require a 7mm wire set. This part cross-references NAPA Mileage Plus 6718120 for the same application.

For buyers searching for a Chrysler Imperial spark plug wire set, Dodge Charger ignition wire replacement, or Denso 671-8120 wire set for vintage Mopar applications, this part provides a direct-fit solution aligned with original equipment standards.

Common Problems This Part Can Address

• Misfires caused by worn or heat-damaged plug wires
• Hard starting related to weak ignition transfer
• Rough idle from cracked insulation or poor terminal contact
• Voltage leakage across aging ignition wires
• Routing issues when replacing non-OE wire lengths or boot angles

Installation Notes and Tips

Verify cylinder routing before removal so each lead returns to the correct spark plug and distributor location. Check boot angle and terminal style against the original setup, especially on Chrysler and Dodge V8 applications where routing clearance is limited. Inspect plugs, distributor cap, and coil connections at the same time to avoid repeat ignition faults after installation.

Quality Assurance

Denso First Time Fit ignition wire sets are engineered to match factory-installed specifications and are manufactured to meet or exceed OE/OES standards for form and performance. The 7mm construction and silicone boot material support consistent ignition service on the listed Chrysler and Dodge applications.