NGK 7164 Spark Plug

NGK Iridium IX Spark Plug 7164

NGK 7164 is an Iridium IX spark plug built for direct replacement use in a wide range of domestic vehicles. It combines an iridium center electrode with a nickel ground electrode and a copper core to support consistent ignition performance in everyday driving and under load.

Compatible With Ford F-150, Chevrolet Silverado 1500, GMC Sierra 1500, and many other applications listed below, this plug is a fitment-based replacement for vehicles that call for NGK TR55IX / stock number 7164.

Key Features

• Iridium center electrode tip for durable spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with taper-cut tip design
• 5,000 ohm resistance for ignition system compatibility
• Pre-gapped at .060 inch for many listed applications
• Tapered seat, 14 mm thread diameter, .708 inch reach
• Non-removable nut terminal and standard single-ground configuration

Iridium IX Product Line

NGK’s Iridium IX line is positioned for drivers who want a fine-wire iridium firing tip and OE-style construction in a replacement spark plug. NGK’s long OE supply background and North American manufacturing network support consistent part quality across domestic and import vehicle coverage.

Detailed Description

Part number 7164 is an NGK Iridium IX spark plug with a 5 heat range, 5/8 hex, and tapered seat design. The iridium center electrode helps maintain a stable spark point, while the copper core and nickel ground electrode support heat control and reliable combustion. This makes it a practical choice for vehicles that specify NGK TR55IX or stock number 7164, including many Ford F-150, Chevrolet Silverado 1500, and GMC Sierra 1500 applications.

This part cross-references Champion 14 and Autolite XP103 for the same application.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weakened ignition output
• Misfire conditions tied to plug wear or gap drift
• Reduced throttle response from inconsistent spark delivery
• Maintenance replacement on high-mileage ignition systems

Installation Notes

Verify the vehicle-specific gap before installation. Listed applications include .060 inch, .054 inch, .052 inch, .050 inch, and .044 inch gap requirements depending on year and model. Confirm the correct fitment for your exact engine and trim before ordering, especially on Ford E-150, Ford E-250, Ford Crown Victoria, Chevrolet Express 1500, and GMC Savana 1500 applications.

• Fits 1999-2019 Ford E-350 Super Duty, N/A
• Fits 1996-2014 Chevrolet Express 1500, N/A
• Fits 2003-2014 Ford E-150, N/A
• Fits 2003-2014 Ford E-250, N/A
• Fits 1996-2014 GMC Savana 1500, N/A
• Fits 1999-2013 Chevrolet Silverado 1500, N/A
• Fits 1999-2013 GMC Sierra 1500, N/A
• Fits 1997-2010 Ford F-150, N/A
• Fits 1992-2011 Ford Crown Victoria, N/A
• Fits 1991-2011 Lincoln Town Car, N/A

Quality Assurance

NGK is a major OE spark plug supplier in North America with more than 80 years of automotive experience. The brand’s manufacturing and distribution footprint supports consistent product standards for ignition service across domestic and import vehicle coverage.