NGK 4177 Spark Plug

NGK V-Power Spark Plug TR6

NGK V-Power Spark Plug TR6 is a copper-core, nickel-tip spark plug built for consistent ignition performance in a wide range of domestic and import applications. With a tapered seat, 14 mm thread diameter, 0.708-inch reach, and 0.040-inch pre-gap, it supports precise fitment for vehicles such as the Ford Mustang, Ford F-150, and Chevrolet Corvette.

Key Features

• NGK V-Power spark plug line for OE-style ignition service
• Copper center electrode core with nickel center electrode tip
• Nickel ground electrode with standard ground configuration
• 5,000 ohm resistance for ignition system compatibility
• 14 mm thread diameter, 5/8 hex size, tapered seat
• Pre-gapped to 0.040 inches
• Part number TR6 / stock number 4177

Product Details

NGK builds this spark plug with a copper core for efficient heat transfer and a nickel electrode design for dependable spark delivery. The V-Power profile uses a standard single-ground configuration and a non-removable nut terminal, making it a practical replacement choice for vehicles that call for this plug specification. NGK’s long OE supply history and North American manufacturing and distribution network support consistent product availability and application coverage. This part number 4177 is commonly searched for Ford Mustang spark plug replacement, Ford F-150 spark plug replacement, and Chevrolet Corvette ignition service.

This part cross-references Autolite 103 and DENSO Auto Parts 5048 for the same application.

Common Uses

• Restoring weak spark or intermittent misfire conditions
• Replacing worn electrodes that can affect idle quality
• Addressing hard-start or rough-running symptoms tied to plug wear
• Maintaining ignition performance during scheduled tune-up service
• Supporting proper combustion in high-mileage ignition systems

Installation Notes

• Verify the vehicle-specific gap before installation; listed applications include 0.044, 0.050, 0.052, and 0.054 inch requirements depending on model.
• Compatible With 2006-2008 Chevrolet Corvette, N/A.
• Compatible With 2003-2008 Ford Focus, N/A.
• Compatible With 2007-2008 Ford Mustang, N/A.
• Compatible With 2005-2006 Ford GT, N/A.
• Compatible With 1999-2006 Ford Taurus, N/A.
• Compatible With 1996-2005 Ford Crown Victoria, N/A.
• Compatible With 2005 Ford Escape, N/A.
• Compatible With 2004-2005 Mazda 3, N/A.
• Compatible With 2003-2005 Mercury Sable, N/A.
• Compatible With 2001 Mercury Sable, N/A.
• Compatible With 2004 Ford F-150 Heritage, N/A.
• Compatible With 2003-2004 Ford Mustang, N/A.
• Compatible With 1999-2003 Ford F-150, N/A.
• Compatible With 1999-2001 Mazda B3000, N/A.
• Compatible With 2000 Aston Martin DB7, N/A.
• Compatible With 1997-2000 Ford Ranger, N/A.
• Compatible With 1999-2000 Ford Ranger, N/A.
• Compatible With 1997-2000 Mazda B4000, N/A.
• Compatible With 1989-1990 Pontiac Grand Prix, N/A.
• Compatible With 1989 Pontiac Firebird, N/A.

Quality Assurance

NGK is a major OE spark plug supplier with more than 80 years of automotive manufacturing experience. The brand’s OE-focused engineering and North American production and distribution capabilities support consistent quality for service replacement applications.