NGK 9198 Spark Plug

NGK Iridium IX Spark Plug 9198 Overview

NGK Iridium IX Spark Plug 9198 is built for drivers who want a precise OE-style ignition component with iridium center electrode technology. It uses a 10 mm thread, 0.75 in. reach, flat seat design, and a pre-gap of .036 for straightforward service on the correct application.

As part of the NGK Iridium IX Spark Plug line, this plug combines a copper core center electrode with an iridium tip, a nickel ground electrode, and a taper-cut ground electrode tip design. The result is a spark plug engineered for stable ignition performance in the right vehicle application, including select Honda Civic and Acura Integra fitments.

Key Features

• NGK Iridium IX Spark Plug, part number 9198
• Iridium center electrode tip material with copper core center electrode
• Nickel ground electrode with standard ground configuration
• Taper-cut ground electrode tip design for focused spark exposure
• 5,000 ohm resistance
• 10 mm thread diameter, .75 in. reach, flat seat
• Pre-gapped at .036
• Heat range 7
• Compatible With select Honda Civic and Acura Integra applications

Detailed Description

NGK 9198 is a secondary ignition spark plug designed around the specifications commonly required in compact import performance and daily-driver applications. The iridium tip supports consistent spark delivery, while the copper core helps manage heat transfer through the plug body. The 5/8 hex size and stud terminal type support standard service procedures when the vehicle calls for this configuration. This part cross-references Anchor (e.g., 9198) for the same application.

For buyers searching for an NGK CPR7EAIX-9 spark plug, NGK 9198, or an iridium spark plug for Honda Civic and Acura Integra service, this part provides the exact construction details needed to match the original application. Use it where the vehicle specification calls for a 10 mm, flat-seat plug with a .75 reach and .036 pre-gap.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from inconsistent spark delivery
• Service replacement needs on select Honda Civic and Acura Integra ignition systems

Installation Notes and Tips

Verify the engine calls for NGK CPR7EAIX-9 / 9198 specifications before installation. Confirm thread diameter, reach, seat type, heat range, and terminal style against the vehicle service information. Check the gap only if the application procedure requires adjustment, and install to the manufacturer’s torque specification for the cylinder head material.

For fitment-based searches, this part fits select Honda Civic and Acura Integra applications where the listed plug dimensions and heat range match the engine requirement. Always compare the old plug’s markings and dimensions before service.

Quality Assurance

NGK is a long-established OE supplier and spark plug manufacturer with broad coverage across domestic and import vehicles, motorcycles, marine engines, and small engines. Its North American and global manufacturing and distribution network supports consistent product availability and OE-level production standards for the specified application.