NGK 4447 RC-TX72 Spark Plug Wire Set, Magnetic Core, Silicone Jacket

The NGK 4447 (RC-TX72) spark plug wire set, also called an ignition wire set or plug wire set, is a replacement ignition cable set from NGK, a leading ignition specialist with extensive OE experience. It carries high-voltage current from the ignition system to the spark plugs. It is built to meet or exceed OE performance and durability.

Key Features:

• 5mm low-resistance magnetic core with variable pitch (loose/tight/loose) wire winding for a strong spark and effective EMI/RFI noise suppression
• Boots at the spark plug and distributor ends are specified to OEM standards or better
• High-temperature silicone outer jacket resists underhood temperatures up to 250°C (482°F), plus moisture, oil and cracking
• Fiberglass braid reinforcement over the inner insulation for dielectric strength and cable tensile strength
• Stainless steel terminals and a silicone seal at the spark plug boot resist corrosion and vibration
• Numbered for easy cylinder identification, with color-coded coil wires for correct installation
• Backed by a Limited Lifetime Warranty

Cross-References: NGK RC-TX72; Toyota 90919-21553, 90919-21557, 90919-21579, 90919-21598.

NGK wires have a lower resistance than conventional carbon-core wires. This helps maintain consistent ignition performance and a long service life.