NGK 7471 Spark Plug

NGK Standard Spark Plug 7471 Overview

The NGK Standard Spark Plug 7471 is a copper-core, nickel-tip spark plug built for steady ignition performance in a wide range of domestic and import applications. It uses a 1 ohm resistor, a flat seat, and a .032 pre-gap to support consistent spark delivery in engines that call for this specification.

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s OE-focused approach to ignition components. NGK supplies spark plugs for many automotive, motorcycle, marine, and small engine applications, with manufacturing and distribution support across North America and global facilities.

Key Features

• Part number 7471, also identified as NGK C8E
• Copper center electrode core with nickel center electrode tip
• Nickel ground electrode with standard tip design and standard configuration
• 1 ohm resistor for ignition system noise control
• .032 pre-gap size for specified applications
• Flat seat design with 10.00 mm thread diameter and .75 reach
• 5/8 hex size and stud terminal type
• Manufacturer heat range 8

Detailed Description

NGK 7471 is a standard replacement spark plug for engines that require a 10 mm, flat-seat plug with a .75 reach and heat range 8. The copper core helps conduct heat efficiently, while the nickel electrode materials support dependable spark transfer in everyday driving conditions. For buyers searching for an NGK spark plug 7471, NGK C8E, or a standard ignition tune-up part for domestic and import vehicles, this plug matches the listed electrical and physical specifications.

This part cross-references AP Exhaust 7471 for the same application. It is also referenced under interchange numbers such as B8C and U24ESN. If you are servicing a vehicle that calls for NGK 7471, verify the thread diameter, seat type, reach, and pre-gap before installation.

Used For These Issues

• Replacing a worn spark plug that causes rough idle
• Restoring ignition performance after misfire symptoms
• Addressing hard starting related to plug wear
• Correcting weak spark from fouled or aged electrodes
• Maintaining proper combustion in engines specified for this plug design

Installation Notes and Tips

Confirm the engine calls for a 10 mm thread diameter, flat seat, .75 reach, and 5/8 hex before installation. Check the gap against the engine specification, even though the plug is pre-gapped at .032, and inspect the ignition system for worn wires, coils, or carbon tracking that can affect plug life. Use the correct torque procedure for the cylinder head material to avoid thread damage.

Quality Assurance

NGK is a long-established OE spark plug supplier with extensive coverage across domestic and import vehicle applications. The brand’s manufacturing standards are built around original equipment requirements for durability and consistent operation.