NGK 7214 Spark Plug

NGK Iridium IX Spark Plug 7214

NGK Iridium IX Spark Plug 7214 is built for drivers who need a precise ignition component with OE-level construction and broad vehicle coverage. This spark plug uses an iridium center electrode, a nickel ground electrode, and a 5,000-ohm resistor to support stable spark delivery in a wide range of classic domestic and import applications.

The NGK Iridium IX line focuses on durable ignition performance with a fine iridium tip, copper core center electrode, flat seat design, and a .040 pre-gap. Part number 7214 is also referenced as GR5IX and cross-references AMS Automotive 4478 for the same application.

Key Features

• Iridium center electrode tip material for consistent ignition performance
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with taper-cut tip design
• 5,000-ohm resistor for electrical noise suppression
• Flat seat, 14 mm thread diameter, and 13/16 hex size
• Manufacturer heat range 5 with .75 reach
• Pre-gapped at .040 for specified applications

Product Details

NGK 7214 is an Iridium IX spark plug designed for a wide span of vehicles from Chevrolet, Pontiac, Ford, Buick, GMC, Geo, and Dodge. It is listed for applications such as 1961-1969 Chevrolet Impala, 1967-1969 Chevrolet Camaro, 1982-1985 Chevrolet S10, 1986-1990 Pontiac Sunbird, and 1971-1976 Ford Pinto, with gap requirements varying by application. This part number is also identified as GR5IX, making it easier to match against service records and catalog references.

NGK has a long OE supply history and manufactures ignition components for domestic and import vehicles, motorcycles, marine engines, and small engine applications. That OE background is reflected in the construction of this spark plug, which is intended to maintain original equipment standards for durability and operational consistency across the listed fitments.

Common Issues This Part Can Address

• Misfire caused by worn or fouled spark plugs
• Hard starting from weak ignition output
• Rough idle related to inconsistent spark delivery
• Reduced throttle response from degraded plug performance
• Service replacement for vehicles calling for NGK 7214 or GR5IX

Installation Notes and Tips

• Verify the vehicle-specific gap before installation; listed applications include .030, .034, .035, .040, and .045 inch requirements.
• Confirm thread diameter, reach, and seat type match the engine specification before tightening.
• Use the correct torque procedure for the cylinder head material and plug seat style.
• Check the ignition system condition if the vehicle has repeated fouling or misfire concerns.

Quality Assurance

NGK is a major OE spark plug supplier with North American manufacturing, inventory, and distribution support. Part number 7214 is built to NGK’s original equipment standards for durability and operational performance across the listed applications.