The Subic Freeport Expressway (SFEX), formerly referred to as the Subic–Tipo Expressway and North Luzon Expressway Segment 7 (NLEX Segment 7), is a 8.8-kilometer (5.5 mi) four-lane expressway that connects the Subic–Clark–Tarlac Expressway to the Subic Freeport Zone in the Philippines. Its alignment traverses the provinces of Bataan and Zambales. The expressway forms part of Expressway 4 (E4) of the Philippine expressway network.