33-5050 is an original replacement type high-performance air filter for flat surfaces. It is specifically designed for several popular compact models of Hyundai and Kia (with 1.4L/1.6L/2.0L naturally aspirated / turbocharged engines). 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, high-speed driving and daily household use scenarios.