NGK 6741 Spark Plug

NGK Laser Iridium Spark Plug 6741

NGK Laser Iridium Spark Plug 6741 is built for OE-style ignition performance across a wide range of import and domestic applications. With an iridium center electrode, nickel ground electrode, and a 0.044 in pre-gap, this spark plug supports consistent combustion and reliable starting in vehicles such as the Subaru Impreza, Toyota Camry, and Nissan Frontier.

Key Features

• Laser iridium center electrode tip for stable spark delivery
• Nickel ground electrode with standard single-ground configuration
• Pre-gapped at 0.044 in for many listed applications
• 5,000 ohm resistance for ignition system compatibility
• Flat seat, 14 mm thread diameter, 0.75 in reach
• NGK part number 6741, manufacturer reference IFR6E11

Product Details

The NGK Laser Iridium Spark Plug line is positioned as an OE-focused replacement option for drivers who want factory-style fit and dependable ignition performance. NGK’s long history as an original equipment supplier shows in the construction of this plug, which uses an iridium-tipped center electrode for durability and a copper core to help manage heat transfer. This part number 6741 is listed across many applications, including 2004-2008 Chevrolet Aveo, 1999-2004 Subaru Forester, and 2001-2004 Nissan Frontier, with gap settings that vary by vehicle and should be verified before installation.

This part cross-references DENSO Auto Parts 4504 and Bosch 6741 for the same application.

What It Helps Address

• Hard starting caused by worn spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to electrode wear
• Reduced throttle response from weak spark output
• Maintenance replacement for OE-style ignition service intervals

Installation Notes and Tips

• Confirm the exact vehicle application before ordering, since gap specifications vary by make and model.
• Set the spark plug gap to the vehicle-specific specification listed in the fitment notes, such as 0.044 in, 0.040 in, 0.050 in, or 0.032 in.
• Inspect ignition coils, wires, and boots during service to avoid repeat misfire issues.
• Use the correct torque procedure for the flat-seat design to help prevent thread or sealing damage.
• Verify the NGK 6741 / IFR6E11 reference against the vehicle’s OE specification before installation.

Quality Assurance

NGK is a major OE spark plug supplier in North America with decades of automotive manufacturing experience. The brand’s OE legacy, broad vehicle coverage, and focus on original equipment standards support consistent durability and operational performance across listed applications.