NGK 4455 Spark Plug

NGK CR7EKB Spark Plug for Reliable Ignition

The NGK Standard Spark Plug, part number 4455, is built for consistent ignition performance in a wide range of domestic and import applications. This NGK CR7EKB spark plug uses a copper center electrode, nickel tip materials, and a 5,000-ohm resistor to support stable spark delivery and reduced electrical noise.

Key Features

• NGK Standard Spark Plug, part number 4455
• CR7EKB configuration with 10.00 mm thread diameter and .75 reach
• Pre-gapped to .032 for straightforward setup
• Copper center electrode core with nickel center and ground electrode tips
• Standard ground configuration with 2 ground electrodes
• Flat seat design and non-removable nut terminal
• Heat range 7 for specified engine applications

Product Details

NGK builds this spark plug to OE-style standards for dependable ignition performance and broad application coverage. The CR7EKB design combines a copper core for efficient conductivity with nickel electrode materials for durable spark transfer. With a 5/8 hex, 50.50 insulator height, and standard ground electrode tip design, this plug is suited for engines that call for the NGK 4455 specification. For buyers searching for an NGK CR7EKB spark plug or part number 4455 for motorcycle, marine, or small engine service, this plug matches the technical profile required by the application.

NGK’s Standard Spark Plug line reflects the brand’s long OE supply background and focus on original equipment standards. That makes this plug a practical choice when replacing worn plugs in vehicles that specify NGK 4455 or CR7EKB, including select Honda Civic and Toyota Corolla applications where the correct heat range and reach are critical.

Common Issues This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark output
• Misfire conditions related to electrode wear
• Reduced fuel efficiency from degraded ignition performance
• Electrical interference concerns in ignition systems that use a resistor plug

Installation Notes and Tips

Verify the engine calls for NGK CR7EKB / 4455 before installation. Confirm thread diameter, reach, seat type, and heat range against the service specification, and check the pre-gap before installing. Use proper spark plug socket tools and torque to the vehicle manufacturer’s specification to avoid thread or insulator damage. For fitment-based searches, this part is commonly referenced for applications such as Fits select Honda Civic and Fits select Toyota Corolla engine configurations when the OE catalog calls for this exact plug specification.

Quality Assurance

NGK is a major OE spark plug supplier in North America with extensive manufacturing experience across automotive, motorcycle, marine, and small engine applications. The 4455 spark plug is produced to support original equipment standards for durability and consistent operation.