NGK 7274 Spark Plug

NGK Iridium IX Spark Plug 7274 Overview

NGK Iridium IX Spark Plug 7274 is built for drivers who want stable ignition performance and OE-style reliability from a trusted spark plug manufacturer. This plug uses an iridium center electrode, a copper core, and a 5,000-ohm resistor to support consistent spark delivery in the ignition system.

Compatible with select Honda Civic and Acura applications that call for NGK CR6HIX, part number 7274, this spark plug is a direct replacement for the specified OE-style application. The Iridium IX line focuses on precise electrode design and durable materials for dependable secondary ignition performance.

Key Features

• NGK Iridium IX spark plug, part number 7274
• Iridium center electrode tip with copper core construction
• 5,000-ohm resistor for ignition noise suppression
• Taper-cut ground electrode tip design
• Standard ground configuration with one ground electrode
• Flat seat design, 10.00 mm thread diameter, 0.5 in reach
• Pre-gapped at .028 for specified applications
• 5/8 hex size and stud terminal type
• Manufacturer heat range 6

Product Details

NGK’s Iridium IX line is engineered for applications that require a fine-wire iridium firing tip and durable electrode materials. The iridium center electrode helps maintain consistent spark characteristics, while the nickel ground electrode and taper-cut tip support efficient flame initiation. With a copper core center electrode and a flat-seat design, this spark plug is built to match the requirements of select Honda Civic and Acura engine applications that specify NGK CR6HIX.

Part number 7274 is also referenced as CR6HIX and cross-references Gates 7274 for the same application. Use this spark plug when servicing ignition systems that call for the listed thread size, reach, heat range, and pre-gap specification.

Common Issues This Spark Plug Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to aged ignition components
• Reduced throttle response from degraded plug performance
• Ignition noise concerns in systems requiring resistor plugs

Installation Notes and Tips

Verify the engine calls for NGK CR6HIX / 7274 before installation. Confirm thread diameter, reach, seat type, heat range, and pre-gap against the vehicle service specification. Inspect the ignition coil, plug wires, and boots during service, and apply proper torque during installation to protect the threads and sealing surface.

For Honda Civic and Acura tune-ups, match the plug to the exact engine application and check the gap only if the service procedure requires adjustment. Clean the plug wells before removal to help prevent debris from entering the cylinder head.

Quality Assurance

NGK is a major OE spark plug supplier in North America with decades of automotive manufacturing experience. The brand’s OE background and broad vehicle coverage support consistent product quality for ignition service parts such as this Iridium IX spark plug.