NGK 6404 Spark Plug Wire Set

NGK Spark Plug Wire Set for Lexus and Toyota

NGK Spark Plug Wire Set 6404 is a specific-fit ignition wire set built for select Lexus and Toyota applications. It uses silicone insulation, a blue outer jacket, and noise suppression construction to support stable ignition performance and cleaner signal delivery.

For drivers searching for a Lexus GS300 spark plug wire set, Lexus IS300 ignition wire replacement, Lexus SC300 wire set, or Toyota Supra spark plug wire set, this NGK part number 6404 matches the listed applications and OE-style fitment requirements.

Key Features

• Specific-fit spark plug wire set for listed Lexus and Toyota vehicles
• Silicone insulation for heat resistance and durability
• Blue insulation color for easy visual identification
• Noise suppression design to help reduce ignition interference
• Mag variable-pitch core material
• Insulation outside diameter: 5.00
• NGK part number 6404 / RC-TE79

Product Details

NGK 6404 is part of the NGK Spark Plug Wire Set line, a product family focused on ignition components for domestic and import vehicles. NGK draws on extensive OE experience and long-term automotive manufacturing expertise to produce replacement ignition parts that meet demanding durability and performance expectations. This wire set is engineered for specific applications rather than universal use, making fitment selection straightforward for the correct Lexus GS300, Lexus IS300, Lexus SC300, or Toyota Supra model year.

This part cross-references DENSO Auto Parts 671-6181 and Beck/Arnley 175-6170 for the same application.

Vehicle Fitment

• Fits 1998-2005 Lexus GS300, N/A; set includes 3 plug leads - other 3 are direct ignition.
• Fits 2001-2005 Lexus IS300, N/A; set includes 3 plug leads - other 3 are direct ignition.
• Fits 1998-2000 Lexus SC300, N/A; set includes 3 plug leads - other 3 are direct ignition.
• Fits 1998 Toyota Supra, N/A; set includes 3 plug leads - other 3 are direct ignition.

Common Issues This Part Helps Address

• Worn or cracked ignition wire insulation
• Electrical noise in the ignition system
• Misfire symptoms caused by deteriorated plug leads
• Hard starting related to weak spark delivery
• Uneven engine operation from aging ignition wires

Installation Notes

Confirm the vehicle year, make, and model before ordering, since this is a specific-fit NGK spark plug wire set. Match the wire routing to the original layout and verify the direct-ignition portion of the system on the listed Lexus and Toyota applications. Inspect related ignition components during replacement to ensure the new wire set performs as expected.

Quality Assurance

NGK is known for ignition component manufacturing with OE-focused engineering and broad vehicle coverage across domestic and import applications. Part number 6404 is built to NGK’s durability and operational performance standards for replacement ignition service.