NGK 51421 Spark Plug Wire Set RC-GMX004 7mm Silicone Ignition Wires

The NGK 51421 spark plug wire set (also listed as RC-GMX004) is an ignition wire set, also called a spark plug cable set. It carries high-voltage current from the coil or distributor to the spark plugs. NGK is known as the Ignition Specialist and has decades of OE experience. This set is built to deliver consistent firing and to help reduce misfire, crossfire and radio-frequency interference (RFI).

Key Features:

• 7mm ultra-low resistance magnetic core, wire-wound ignition cable
• Spark plug and distributor boots specified to OEM standards or better
• High-temperature silicone outer jacket resists underhood temperatures up to 482°F (250°C), plus moisture, oil, fuel and cracking
• Premium high-density fiberglass braid reinforcement over EPDM/silicone inner insulation for strong dielectric performance and cable tensile strength
• Positive-locking, corrosion-resistant stainless steel terminal ends for a tight fit and resistance to vibration and separation
• Silicone seal at the spark plug boot
• Wires are numbered for easy cylinder identification, and coil wires are color coded to simplify installation
• Includes 6 wires with coil lead

This NGK wire set helps restore smooth, reliable ignition performance. It is a durable replacement for worn or cracked wires that cause misfire, rough idle or hesitation.