NGK 94567 Spark Plug

NGK Ruthenium HX Spark Plug 94567

NGK 94567 is a Ruthenium HX High Ignitability spark plug built for direct-fit service on a wide range of domestic applications. It combines a ruthenium center electrode tip with NGK’s high-ignitability dual fine electrode ground design to support consistent spark delivery and stable combustion.

Compatible With Chevrolet Silverado 1500, Ford F-150, GMC Sierra 2500 HD, and many other listed applications, this spark plug is a fitment-based replacement for vehicles that call for NGK TR5AHX / 94567 specifications.

Key Features

• NGK Ruthenium HX High Ignitability Spark Plug line
• Part number 94567; NGK TR5AHX reference
• Ruthenium center electrode tip material
• Dual Fine Electrode ground tip design for high ignitability
• Copper core center electrode for heat transfer
• Nickel ground electrode core material
• 5000 ohm resistance
• Tapered seat, 14 mm thread diameter, 5/8 hex
• Pre-gapped at .044 inches from the manufacturer

Product Details

NGK’s Ruthenium HX line is built around OE-focused ignition performance and broad vehicle coverage. NGK is a long-established OE supplier in North America, and this spark plug reflects that background with materials and geometry selected for reliable ignition response, clean combustion, and consistent service in everyday driving conditions. The 94567 spark plug is listed across many Chevrolet, GMC, Ford, Cadillac, Buick, and other applications, including trucks, vans, SUVs, and performance cars.

This part cross-references NGK TR5AHX for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle and inconsistent combustion
• Misfire conditions tied to weak spark output
• Reduced throttle response from aged ignition components
• Maintenance replacement on high-mileage ignition systems

Installation Notes

• Verify the vehicle-specific gap before installation; many listed applications call for 0.040 inches, while some Ford applications specify 0.044, 0.048, 0.052, or 0.054 inches.
• Check the seat type, thread diameter, reach, and hex size against the original plug before service.
• Use the fitment notes for each vehicle listing, especially where gap recommendations differ by year or engine calibration.
• Follow the manufacturer service procedure for torque and ignition system inspection.

Quality Assurance

NGK manufactures spark plugs for domestic and import vehicles and supports OE-level standards across its ignition product range. The brand’s North American OE legacy and broad vehicle coverage make the 94567 a technical replacement choice for service work on compatible applications.