Auto air filters have the important job of keeping dirt and debris out of the engine, while also allowing ample air flow. An air filter must fit snugly in its housing to block contaminants and prevent air leakage. To accomplish this, air filters have a seal around their perimeter. But not all seals are created equal. Under hood temperatures can get extremely high, causing distortion of low-quality seals. For this reason, it’s important to get an automotive air filter with a seal that can withstand extreme temperatures. High quality air filters, such as those from Premium Guard, are designed to take the heat.