NGK 58401 Spark Plug Wire Set Silicone Ferro Mag Core 7mm (RC-GMX003)

The NGK 58401 spark plug wire set (also called an ignition wire set or spark plug cable set, NGK series RC-GMX003) carries high-voltage current from the ignition coil to the spark plugs. It is built to OE tolerances with OE-quality or better materials, so it gives a precise, reliable fit.

Key Features:

• Core: Ferro Mag magnetic core with noise suppression. Resistance is about 8k ohm per meter, compared with the conventional 16k ohm per meter of carbon-core wires.
• Insulation: Blue silicone jacket, 7mm outside diameter. It withstands underhood temperatures up to 482°F.
• Boots: Black silicone boots. There are six straight 180° spark plug end boots and 90° coil end boots. Each boot is glued to the cable with silicone sealer for a watertight seal.
• Terminals: Stainless steel terminals with up to 3 serrated crimps bite into the cable jacket and inner insulation for strong retention.
• Connection: A locking C-shaped spring clip with corrosion-resistant plating keeps the spark plug terminal connection secure.
• Installation: Wires are numbered for cylinder identification, and the coil wires are color coded.
• Design: Vehicle-specific design, not universal. Wire separators are not included.
• Warranty: Limited lifetime warranty.

Cross-references include NGK RC-GMX003, Bosch 09315, Delphi XS10543, DENSO 671-6070, Federal Parts 3164 and Autolite 97119. NGK is a long-time OE ignition supplier, and this set restores crisp ignition performance and helps suppress radio interference.