NGK 4393 Spark Plug Wire Set

NGK Spark Plug Wire Set for OE-Style Ignition Service

NGK Spark Plug Wire Set 4393 is a specific-fit ignition wire set built for older domestic and import applications that need reliable spark delivery and noise suppression. With blue silicone insulation and a mag core with variable pitch, this NGK wire set is built to support stable ignition performance on vehicles such as the Chevrolet S10, GMC S15, and Isuzu Pickup.

Key Features

• Specific-fit spark plug wire set for direct application matching
• Blue silicone insulation for heat resistance and durability
• Noise suppression design to help reduce ignition interference
• Mag core with variable pitch for consistent spark transfer
• 7.00 mm insulation outside diameter
• NGK part number 4393, also identified as RC-IE42

Product Details

NGK Spark Plug Wire Set 4393 is part of NGK Spark Plug Wire Set line, backed by NGK’s long history in ignition components and OE-focused manufacturing. NGK develops ignition products for domestic and import vehicles, with an emphasis on durability, operational performance, and OE-level standards. This wire set is a practical replacement choice for vehicles that need a direct-fit ignition wire solution, including 1982-1985 Chevrolet S10, 1983-1984 Chevrolet S10 Blazer, 1982-1985 GMC S15, 1983-1984 GMC S15 Jimmy, 1981-1987 Isuzu Pickup, 1981-1985 Isuzu I-Mark, 1983-1987 Isuzu Impulse, 1984-1985 Isuzu Trooper, and 1975-1982 Chevrolet LUV.

This part cross-references Gates 12463 and Four Seasons 55434 for the same application.

Common Issues This Part Can Address

• Misfires caused by worn or deteriorated plug wires
• Weak spark transfer from cracked or aged insulation
• Ignition noise that can interfere with vehicle electronics
• Hard starting related to poor secondary ignition performance
• Rough idle or hesitation from inconsistent spark delivery

Installation Notes and Tips

Verify engine layout and wire routing before installation, since this is a specific-fit application. Match each lead to the correct cylinder and coil or distributor terminal, and inspect boots, terminals, and routing clips during service. For best results, replace wires when insulation is brittle, oil-soaked, or heat-damaged, and confirm the part number 4393 matches your vehicle before ordering.

Quality Assurance

NGK is known for ignition components engineered to OE standards, with manufacturing and distribution support in North America and globally. The brand’s focus on ignition systems and long-standing automotive experience supports consistent product quality for replacement service.