NGK 6403 Spark Plug Wire Set for 1990-1994 Lexus LS400/SC400 4.0L

Vehicle Fitment

• 1990-1994 Lexus LS400 (4.0L V8, RWD)
• 1992-1994 Lexus SC400 (4.0L V8, RWD)

Features

• OE-style spark plug wire set engineered for direct replacement
• 5 mm diameter silicone insulated cables for high-temperature durability
• Variable-pitch magnetic core for ultra-low resistance and interference suppression
• EPDM/silicone jacket resists cracking and heat deterioration up to ~250 °C
• Stainless steel terminals for strong electrical connections
• Noise suppression design limits EMI/RFI interference with ignition systems
• Boots securely molded to wires with silicone sealer for reliable sealing
• Engineered for improved ignition reliability and smoother engine performance

Specifications

• NGK Part Number: 6403 / RC-TE132
• Type: Spark Plug Wire Set (8 wires, including coil leads)
• Wire Diameter: 5 mm
• Insulation: EPDM/Silicone
• Core: Variable-pitch magnetic alloy for low resistance
• Resistor: Yes (suppression built-in)
• Direct OE fit for specified Lexus V8 engines
• Color: Blue wires with black boots

Included Components

• 1x Complete spark plug wire set (8 wires)

Product Description

The NGK 6403 Spark Plug Wire Set is a high-quality ignition lead assembly designed to replace worn or damaged wires on select Lexus vehicles equipped with the 4.0 L V8 engine. Manufactured to OEM standards, this set features 5 mm silicone-insulated cables with variable-pitch magnetic cores that deliver excellent electrical conductivity while suppressing electromagnetic and radio frequency interference. The EPDM/silicone outer jacket provides long-lasting resistance to heat, oil, and abrasion in the engine bay.

Directly fitting 1990-1994 Lexus LS400 and 1992-1994 Lexus SC400 models, NGK's spark plug wire set ensures consistent spark energy delivery for reliable engine performance and smoother running. Stainless steel terminals and securely molded boots help maintain positive connections even under vibration and high-temperature conditions. Ideal for restoring ignition performance and preventing misfires, this set is engineered for straightforward installation. Fitment confirmed through 1994; applications outside the listed vehicles may require verification.