NGK 7348 Spark Plug

NGK Iridium IX Spark Plug 7348 Overview

NGK Iridium IX Spark Plug 7348 is built for precise ignition performance in select Ford applications, including the 1995 Ford Mustang and 1970-1972 Ford Mustang H.O. setups. It uses an iridium center electrode, a nickel ground electrode, and a tapered seat design to support consistent spark delivery and stable combustion.

The NGK Iridium IX Spark Plug line focuses on durable electrode construction and OE-style fitment standards. Part number 7348 is also identified as UR6IX and is a direct replacement option for drivers servicing Mustang ignition systems that call for this specification.

Key Features

• Iridium center electrode tip material for fine-wire spark performance
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with taper-cut tip design
• 5,000 ohm resistance for ignition system control
• Pre-gapped at .040 inch
• Tapered seat type with 14 mm thread diameter and 5/8 hex size
• Manufacturer heat range 6
• Non-removable nut terminal design

Detailed Product Description

NGK part number 7348 is an Iridium IX spark plug engineered for select Ford Mustang engine applications. The iridium tip helps maintain a focused spark point, while the copper core supports heat dissipation through the plug body. Its tapered seat and standard ground configuration match the requirements of the listed applications, making it a practical choice for ignition service on 1995 Ford Mustang models and 1970-1972 Ford Mustang H.O. engines.

This spark plug cross-references DENSO Auto Parts 4511 for the same application. The NGK 7348 / UR6IX designation is useful when matching service parts by OE-style specification, thread size, reach, and heat range.

Common Issues This Part Can Address

• Misfire caused by worn or eroded spark plug electrodes
• Hard starting from weak or inconsistent ignition spark
• Rough idle related to degraded plug performance
• Reduced throttle response from inefficient combustion
• Service replacement for plugs that no longer hold the specified gap

Installation Notes and Tips

Verify engine application before installation and confirm the plug matches the required tapered seat, 14 mm thread diameter, .46 reach, and heat range 6 specification. Set the spark plug gap to the vehicle note provided for your application: 0.050 inch for the 1995 Ford Mustang and 0.034 inch for 1970-1972 Ford Mustang H.O. models. Use proper spark plug tools to avoid damaging the iridium tip or the threads in the cylinder head.

Quality Assurance

NGK is a major OE spark plug supplier in North America with decades of automotive manufacturing experience. Part number 7348 is produced to support original-equipment standards for durability and consistent ignition performance in the listed Ford Mustang applications.