Fuel Caps are designed to seal the vehicle fuel system to prevent evaporation and contamination. There are two common styles of fuel caps, vented and non-vented. Vented fuel caps allow fuel pressure to be released from the fuel system (commonly used on vehicles pre 1985). Non-vented fuel caps are designed to maintain the integrity of the fuel system, they do not allow fuel pressure to be released from the system, required with the introduction of emission control regulations (vehicles manufactured post 1985). Tridon offers an extensive range of both vented and non-vented fuel caps. The Tridon fuel cap range is available in both locking and non-locking styles. Please refer to the Tridon Part Finder for the correct fuel cap for your application.