NGK 51374 Spark Plug Wire Set

Ignition Wire Set Overview

NGK Spark Plug Wire Set 51374 is a specific-fit ignition wire set built for classic Chevrolet, GMC, Buick, Oldsmobile, Pontiac, and Checker applications. It uses silicone insulation, a blue outer jacket, and noise suppression construction to support stable spark delivery and reduced electrical interference.

Compatible With 1974-1979 Chevrolet and GMC V8 applications, including HEI-equipped models, this NGK wire set is a direct replacement option for restoration and maintenance work. Part number 51374 is also referenced as RC-GMZ004.

• Specific-fit spark plug wire set for selected domestic applications
• Silicone insulation for heat resistance and flexibility
• Noise suppression design to reduce ignition interference
• SMag core material for consistent ignition performance
• Blue wire jacket for easy visual identification

Detailed Fitment and Use

This NGK Spark Plug Wire Set 51374 covers a wide range of 1974-1979 Chevrolet and GMC models, along with selected Buick, Oldsmobile, Pontiac, and Checker vehicles. Fitment includes applications such as Fits 1975-1977 Chevrolet Camaro, N/A and Fits 1975-1976 Chevrolet C10, N/A with High Energy Ignition (HEI), making it a strong match for owners servicing original ignition systems on classic GM platforms. The part number 51374 appears in interchange listings with several aftermarket references for the same application.

This part cross-references Gates (e.g., 6818, 6830) for the same application.

Common Issues It Can Address

• Cracked or aged ignition wires
• Misfires caused by worn conductor materials
• Electrical noise affecting ignition performance
• Hard starting from inconsistent spark transfer
• Heat-related insulation breakdown

Installation Notes

Verify engine and ignition system configuration before ordering, especially on HEI-equipped vehicles. Match the wire routing and terminal style to the original setup, and inspect plugs, distributor cap, and coil components during service. Confirm the application against the vehicle listing for the exact model year and ignition type.

Quality Assurance

NGK brings more OE ignition expertise globally than any other brand and manufactures premium ignition products to OE-level durability and performance standards. Part number 51374 reflects NGK’s focus on replacement parts for domestic and import vehicles.