NGK 6399 Spark Plug Wire Set

NGK Spark Plug Wire Set for Nissan and Infiniti

NGK Spark Plug Wire Set 6399 is a specific-fit ignition wire set built for select Nissan and Infiniti applications. It uses blue silicone insulation, a Mag (Var. Pitch) core, and noise suppression to support stable spark delivery and reduced electrical interference.

Key Features

• Specific-fit spark plug wire set for confirmed vehicle applications
• Blue silicone insulation for heat resistance and durability
• Mag (Var. Pitch) core material for ignition performance
• Noise suppression type included
• 7.00 mm insulation outside diameter
• NGK part number 6399 / RC-NX07

Product Details

NGK Spark Plug Wire Set 6399 is part of NGK’s ignition product line, which focuses on OE-level replacement components for domestic and import vehicles. NGK draws on long-term ignition engineering experience and global manufacturing standards to produce wire sets that meet the demands of everyday driving and consistent engine operation. This wire set is a direct-fit solution for 1991-1994 Nissan Sentra, 1991-1993 Nissan NX, 1991-1993 Infiniti G20, and 1994 Infiniti G20 built to 1/1994. This part cross-references DENSO Auto Parts 671-4192 for the same application.

What It Helps Address

• Misfires caused by worn or damaged ignition wires
• Hard starting related to weak spark transfer
• Rough idle from inconsistent ignition delivery
• Electrical noise that can interfere with ignition performance
• Heat-related wire deterioration in aging engine bays

Installation Notes and Tips

Verify engine application and routing before installation, especially on 1994 Infiniti G20 models built to 1/1994. Match each wire to the correct cylinder and coil connection, and inspect plugs, boots, and related ignition components at the same time. For best results, install on a cool engine and confirm secure seating at every terminal.

Quality Assurance

NGK is known for ignition components engineered to OE standards, with a focus on durability and consistent operational performance. The 6399 spark plug wire set reflects that OE-oriented approach for select Nissan and Infiniti vehicles.