The PH977A FRAM Engine Oil Filter is a high-quality, durable filter designed specifically for various heavy-duty Ford truck engines. With a diameter of 3 3/4 inches and a length of 7 inches, this oil filter is designed to effectively trap and strain out impurities and contaminants from the engine oil, ensuring optimal performance and longevity for the vehicle. The Fram brand is known for its reliability and this oil filter is no exception, making it a great choice for Ford truck owners looking to keep their engine running smoothly.