Westport Fuel Systems Inc. engages in the engineering, manufacturing, and supplying alternative fuel systems and components for use in transportation applications in Europe, Asia, North America, South America, and internationally. The company operates through four segments: Cespira, Light-Duty, High-Pressure Controls and Systems, and Heavy-Duty OEM. It offers alternative fuel, such as hydrogen (H2), liquefied natural gas (LNG), biogas, biomethane, renewable natural gas (RNG), compressed natural gas (CNG), and liquefied petroleum gas (LPG); and pressure regulators, injectors, electronic control units, valves and filters, complete bi-fuel, mono-fuel and dual-fuel LPG and natural gas conversion kits, and high-pressure hydrogen components.