NGK 6988 Spark Plug

NGK Iridium IX Spark Plug for OE-Style Ignition Performance

NGK Iridium IX Spark Plug 6988 is built for drivers who need a precise replacement spark plug with OE-level fitment details and durable ignition materials. This 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 Honda, Acura, and Saab applications.

Key Features

• NGK Iridium IX Spark Plug, part number 6988 / BKR7EIX-11
• Iridium center electrode tip for consistent ignition performance
• Nickel ground electrode with standard configuration and taper cut tip design
• 5,000 ohm resistance for ignition system compatibility
• Pre-gapped at 0.044 inches; verify and adjust to vehicle specification before installation
• 14 mm thread diameter, 0.75 in reach, flat seat, 5/8 in hex
• Heat range 7 for applications that call for this NGK specification

Product Details

The NGK Iridium IX line is engineered around fine-wire iridium construction to support reliable spark and long service life in demanding ignition systems. This BKR7EIX-11 spark plug is a direct-spec replacement for many Honda Civic, Honda S2000, Acura RSX, Acura CSX, Acura Integra, and Saab 9-5 applications listed in the fitment data. The part number 6988 is also referenced as BKR7EIX-11, making it easier to confirm the correct plug when matching OE-style specifications.

NGK has a long history as an OE supplier for domestic and import vehicles, and this spark plug reflects that focus on original-equipment standards, dimensional accuracy, and dependable operation across automotive, motorcycle, marine, and small engine applications. This part cross-references Gates 6988 for the same application.

Common Issues This Spark Plug May Address

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded ignition performance
• Maintenance replacement for vehicles calling for NGK BKR7EIX-11 / 6988

Installation Notes and Tips

• Fits 2006-2011 Honda Civic, N/A; adjust spark plug gap to 0.044 inches.
• Fits 2007-2010 Acura CSX, N/A; adjust spark plug gap to 0.044 inches.
• Fits 2000-2009 Honda S2000, N/A; adjust spark plug gap to 0.044 inches.
• Fits 2002-2006 Acura RSX, N/A; adjust spark plug gap to 0.044 inches.
• Fits 1999-2003 Saab 9-5, N/A; gap of 0.039 inches.
• Fits 2001 Acura Integra, N/A; adjust spark plug gap to 0.044 inches.

Confirm the vehicle’s required gap and heat range before installation. Use the specified torque procedure for the engine, and inspect ignition coils, boots, and plug wells during service to help maintain consistent performance.

Quality Assurance

NGK manufactures spark plugs to OE standards and supports a broad range of domestic and import vehicle applications. The brand’s North American and global manufacturing and distribution network is built around consistent product quality, inventory availability, and application coverage.