The ALTA Performance Open Cell foam filter will increase horsepower, filter better and is simple & easy to install! This is a direct replacement for all ALTA Cold Air Intake Systems as well as any universal applications needing a filter with a 2.75" mouth. ALTA Performance filters feature a unique two piece design allowing the user to remove the foam filter element for easy cleaning. Easily run the element under a faucet for cleaning and ring out by hand. Simply slip the foam sleeve back over the filter frame and you're ready to go.