33-3131 is an original replacement type high-performance air filter for flat surfaces. It is specifically designed for several popular SUVs and sedans of Ford and Lincoln (including Focus MK4, Escape, Bronco Sport, Maverick, Lincoln Corsair, etc.). It can be directly installed in the original air filter box without any additional modifications. It offers both power enhancement and long-term filtration protection, suitable for urban commuting, highway driving, light off-roading and daily household use scenarios.