Performance - the filtration efficiency of Genuine Mack Truck Air Filters provides your engine with the best-operating conditions. Reliability - Mack Truck's design team has devoted a great deal of time and effort developing engine air filters that are leak proof under normal operating conditions - both internally and at external connections Service Life - The high dirt retention capacity of all Mack Truck engine filters is the first step in a long service life. Mack Truck engine filters are made from strong materials that are built to withstand the grueling engine environment, including heat and cold. Economy - Mack Truck engine air filters give an engine the operating conditions it requires, which allows the engine to perform efficiently. Mack Truck engine filters are easy to install and work - with no special training or tools required.