Reviews Description: Purolator Classic Air Filter will peak the engine performance. A key to peak engine performance is the flow of air to the ignition point. A key to minimizing engine wear is the cleanliness of that air. A fresh Purolator air filter meets those two requirements high volumes of air for efficient operation and clean air for reduced engine wear. Purolator air filters use specially treated paper to maximize air flow while trapping harmful dirt. Gaskets surrounding the filtering media provide a seal within the air intake chamber. Gaskets should remain flexible under cold conditions. The Purolator air filter will not void new car warranties and are warranted to be free from manufacturer's defects.