## Twin Air 152213 (HFF4012) Air Filter Insert - Ultimate Engine Protection The Twin Air 152213 (HFF4012) is a foam air filter insert designed to provide maximum protection for your engine. Precision manufacturing and high-quality materials guarantee long life and optimal performance. ### Perfect Fit and Construction The Twin Air 152213 (HFF4012) air filter insert is precisely designed to fit your motorcycle perfectly. Twin Air has molds for over 1500 different motorcycle models dating back to 1965, eliminating the problem of "universal fit". The dual-layer foam, made to Twin Air specifications, features evenly sized and distributed cells, ensuring excellent air filtration. ### Reusable and Easy to Maintain The Twin Air 152213 (HFF4012) filter is reusable and washable, saving you money and protecting the environment. Reusing a Twin Air filter 30 times is common. Minimized seams, thanks to a revolutionary micro-gluing process, and a greaseless sealing ring further enhance its durability and performance. Each filter is hand-assembled and inspected for a perfect fit, guaranteeing the highest quality. ### Additional Benefits The Twin Air 152213 (HFF4012) filter is packaged in a resealable and reusable bag. In some applications, the filter has a flame-retardant foam layer that eliminates the restrictive, stock backfire screen, further increasing airflow and improving performance. Choose the Twin Air 152213 (HFF4012) and provide your engine with the best protection.