NGK 2741 Spark Plug

NGK Racing Spark Plug 2741 Overview

NGK Racing Spark Plug 2741 is built for performance-focused ignition systems that need consistent spark delivery and stable operation under demanding conditions. This NGK spark plug uses a copper center electrode, nickel tip materials, a flat seat, and a 14 mm thread diameter with a .75 reach for applications that call for this specification.

Part number 2741 is part of NGK’s Racing Spark Plug line, which reflects the brand’s motorsports-oriented tuning and ignition expertise. NGK’s long OE background and North American manufacturing and distribution network support the quality and application coverage behind this plug.

Key Features

• NGK Racing Spark Plug part number 2741
• Resistance: 5000 ohms
• Pre-gap size: .032
• Center electrode core material: copper
• Center electrode tip material: nickel
• Ground electrode tip design: pin type
• Ground configuration: slant
• Ground electrode core material: nickel
• Flat seat design
• 14.00 mm thread diameter and .75 reach
• 13/16 hex size
• Manufacturer heat range: 11

Detailed Description

NGK 2741, also identified as R6252K-105, is a racing spark plug engineered around a copper core and nickel electrode materials for controlled ignition performance. The 5000-ohm resistance helps support stable electrical operation, while the pin-type ground electrode and slant ground configuration are suited to performance applications that require precise spark characteristics. If you are sourcing an NGK spark plug for a performance build, race engine service, or a direct-spec replacement, part number 2741 provides the key dimensions and electrode design details needed for accurate selection.

For buyers searching by vehicle terms, this plug is commonly researched for performance ignition service on Honda Civic and Toyota Corolla applications where the correct thread, reach, seat type, and heat range must match the engine specification. Always verify the required plug dimensions against the vehicle service information before installation. This part cross-references Hayden 2741 for the same application.

Common Issues This Part Addresses

• Misfire caused by worn or incorrect spark plug specifications
• Hard starting from weak or inconsistent ignition output
• Rough idle related to plug wear or improper gap
• Loss of throttle response from degraded spark delivery
• Ignition performance problems in engines requiring a .032 pre-gap

Installation Notes and Tips

Confirm the thread diameter, reach, seat type, heat range, and terminal style before installation. Use the specified gap setting of .032 unless the engine application calls for a different value, and inspect the ignition system for coil, wire, or fuel-related faults if symptoms continue after replacement. For vehicle-specific service, match the plug to the exact engine requirements on the Honda Civic or Toyota Corolla application you are servicing.

Quality Assurance

NGK is a major OE spark plug supplier with decades of automotive manufacturing experience and broad coverage across domestic and import applications. Part number 2741 reflects that OE-focused engineering background and the brand’s emphasis on durability and operational consistency.