NGK 95605 Spark Plug

NGK Ruthenium HX Spark Plug 95605

NGK 95605 is a Ruthenium HX High Ignitability spark plug built for modern ignition systems that need stable firing, consistent combustion, and OE-style fitment. It uses a ruthenium center electrode tip, copper core construction, and a projected high-ignitability ground design to support reliable starts and smooth engine operation.

Key Features

• Ruthenium center electrode tip for durable ignition performance
• Projected Square Platinum Electrode - High Ignitability ground design
• Copper core center and ground electrodes for efficient heat transfer
• Pre-gapped at .032 inch for many listed applications
• 5,000 ohm resistance for ignition system noise control
• Tapered seat, 14 mm thread diameter, 25.00 mm reach, and 5/8 hex
• NGK part number 95605, also identified as LTR7BHX

Product Details

This NGK Ruthenium HX High Ignitability Spark Plug is part of NGK’s long-running OE-focused ignition lineup. NGK supplies spark plugs for a wide range of domestic and import vehicles, and this design reflects that background with materials and dimensions selected for dependable spark delivery and consistent service life. It is a direct-fit style spark plug for applications including Ford F-150, Ford Mustang, Cadillac CTS, and Cadillac CT4, with fitment coverage extending across multiple model years and engine calibrations. Part number 95605 is a practical choice when you need a replacement spark plug that matches the specified heat range, gap, and seat style for the vehicle application.

Common Uses

• Replacing worn spark plugs that cause rough idle
• Addressing hard starting or extended crank time
• Restoring misfire-related drivability concerns
• Correcting poor fuel burn from worn electrode wear
• Maintaining ignition performance on Ford F-150, Ford Mustang, and Cadillac applications

Installation Notes

Verify the vehicle’s required gap before installation and adjust only if the application calls for it. This plug uses a tapered seat, 14 mm thread diameter, 25.00 mm reach, and a 5/8-inch hex, so confirm the cylinder head specification before service. For listed Ford F-150, Ford Mustang, Cadillac CTS, and Cadillac CT4 applications, follow the factory service procedure and torque specification. This part cross-references Dorman - HELP 95605 for the same application.

Quality Assurance

NGK is a major OE spark plug supplier with more than 80 years of automotive experience and manufacturing support across North America and global facilities. The brand’s OE legacy and application coverage support consistent product quality for ignition service on passenger vehicles and light-duty trucks.