The Motorcraft SP420A Secondary Ignition - Spark Plug is a high-quality replacement part designed specifically for the Ford Mustang 4.7L engine. Made in the United Arab Emirates, this spark plug ensures reliable ignition performance for your vehicle. With OE/OEM part number BSF42CA and manufacturer part number SP420A, you can trust that this spark plug will keep your engine running smoothly and efficiently. Upgrade your ignition system with this top-notch Motorcraft spark plug for optimal performance.