NGK 90374 Spark Plug

NGK Laser Platinum Spark Plug for Ford Applications

NGK Laser Platinum Spark Plug 90374 is an OE-style ignition component built for select Ford vehicles, including Mustang and F-150 applications. It uses a platinum center electrode, nickel ground electrode, and a 0.052 in pre-gap to support stable spark delivery and consistent combustion.

Key Features

• Laser Platinum design with platinum center electrode for durable spark performance
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with standard tip and standard configuration
• 5,000 ohm resistance for ignition system compatibility
• Tapered seat, 14 mm thread diameter, 5/8 in hex size
• Manufacturer heat range 6 with a 0.052 in pre-gap
• OE-equivalent design for factory-style service replacement

Product Details

NGK’s Laser Platinum line is positioned as an OE replacement spark plug family for drivers who want factory-matched fit and performance characteristics. Part number 90374, also identified as LTR6DP13, is listed for 2011-2014 Ford F-150, 2015-2017 Ford F-150, 2011-2014 Ford Mustang, 2015-2017 Ford Mustang, and 2018-2019 Ford Mustang applications with the specified gap and seat style. This part cross-references AC Delco APP5363 and Motorcraft CYFS12F1 for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to excessive plug wear
• Reduced fuel economy from weak spark delivery
• Loss of throttle response from degraded ignition performance

Installation Notes and Tips

Verify the vehicle’s engine code, plug reach, seat type, and specified gap before installation. For 2011-2019 Ford Mustang and 2011-2017 Ford F-150 applications listed here, the required gap is 0.052 in. Use proper spark plug service procedures, and inspect ignition coils, boots, and threads during replacement to help ensure correct operation.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across domestic and import ignition applications. The brand’s North American manufacturing and distribution network supports OE-level standards for durability and consistent performance in service.