NGK 6715 Spark Plug

NGK BR8HS SOLID Spark Plug

The NGK BR8HS SOLID spark plug is a standard replacement ignition component built around a copper center electrode, nickel tip materials, and a 5,000 ohm resistor for stable secondary ignition performance. It is a direct-fit style spark plug for applications that call for a 14 mm thread, .500 inch reach, flat seat, and .028 pre-gap.

NGK’s Standard Spark Plug line is focused on OE-style durability and consistent operation across domestic and import vehicles. Part number 6715, also identified as BR8HS SOLID, reflects NGK’s long-standing role as an OE supplier with broad coverage for automotive, motorcycle, marine, and small engine applications.

Key Features

• NGK Standard Spark Plug, part number 6715
• BR8HS SOLID configuration with non-removable nut terminal
• 5,000 ohm resistor for ignition noise suppression
• Copper center electrode core with nickel tip material
• Nickel ground electrode core with standard ground design
• .028 pre-gap size for specified ignition systems
• 14.00 mm thread diameter, .5 reach, flat seat
• 13/16 hex size for common spark plug service tools
• Heat range 8 for applications requiring this specification

Detailed Description

Use this NGK spark plug when your vehicle calls for the BR8HS SOLID specification or NGK 6715. The standard electrode layout, single ground electrode, and copper/nickel construction are selected to support reliable spark delivery and consistent combustion in properly matched engines. For buyers searching for an NGK spark plug for Honda Civic, Toyota Corolla, or other make/model applications, the correct fit depends on the exact engine and ignition specification listed by the vehicle manufacturer.

This part cross-references Bosch 6715 for the same application.

Common Issues It Can Help Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Misfire conditions tied to incorrect plug gap or electrode wear
• Reduced fuel efficiency from degraded ignition performance
• Engine hesitation under load when the plug no longer matches spec

Installation Notes and Tips

Verify the engine’s required thread diameter, reach, seat type, heat range, and gap before installation. This plug uses a non-removable nut terminal and a flat seat, so confirm the ignition lead or coil connection and cylinder head design match the BR8HS SOLID specification. For best results, compare the old plug’s part number and service manual data before installing in your Honda Civic, Toyota Corolla, or other vehicle application.

Quality Assurance

NGK is a major OE spark plug supplier in North America with manufacturing and distribution support across the region and globally. The Standard Spark Plug line is built to original equipment standards for durability and operational consistency in the applications it was engineered for.