NGK 7966 Spark Plug

NGK G-Power Spark Plug for Ford Mustang

The NGK G-Power Spark Plug, part number 7966, is built for drivers who want consistent ignition performance and OE-style reliability. It uses a platinum center electrode, nickel ground electrode, and a 5,000 ohm resistor to support stable spark delivery in everyday driving and performance-tuned applications.

Compatible With 1995 Ford Mustang and 1970-1972 Ford Mustang H.O. applications, this NGK spark plug is a direct-fit ignition service part for select Mustang engines. The tapered seat, 14 mm thread diameter, .46 reach, and .040 pre-gap help simplify replacement when the correct application is confirmed.

Key Features

• NGK G-Power Spark Plug line for OE-style ignition service
• Part number 7966 / NGK UR6GP
• Platinum center electrode tip for durable spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with trapezoid tip design
• 5,000 ohm resistor to help control electrical noise
• Tapered seat, 14 mm thread diameter, .46 reach
• Pre-gapped at .040 inches

Product Details

NGK has decades of OE supply experience and manufactures spark plugs for a wide range of domestic and import vehicles. The G-Power Spark Plug line focuses on dependable ignition performance with materials selected for durability and consistent firing characteristics. For Mustang owners, part number 7966 provides a service option for 1995 Ford Mustang and 1970-1972 Ford Mustang H.O. applications where the listed specifications match the engine requirements.

This part cross-references Bosch 6722 and AMS Automotive 4716 for the same application.

Common Issues This Part Can Help Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Misfire conditions related to aged ignition components
• Reduced throttle response from degraded plug performance
• Maintenance replacement for select Ford Mustang ignition service

Installation Notes and Tips

Verify engine application, thread size, reach, seat type, and heat range before installation. For 1995 Ford Mustang applications, set spark plug gap to 0.050 inches as noted in fitment data. For 1970-1972 Ford Mustang H.O. applications, use a 0.034 inch gap. Confirm the ignition system is in good condition and inspect plug wires, coils, and boots during service.

Quality Assurance

NGK is a long-established OE supplier with broad North American coverage and manufacturing standards focused on durability and operational performance. Part number 7966 is produced to support consistent ignition service for the specified Ford Mustang applications.