An automotive engine is an air pump. It delivers air to a combustion chamber where it is mixed with fuel and ignited. The controlled explosion resulting from the combination of air, fuel and spark provides a thrust on the piston, which provides power to the vehicle.

It takes from 9,000 to 10,000 gallons of air for each gallon of fuel that propels today's cars. And the only way for air to enter the engine is through the air intake after passing through the air filter. But if the air filter is dirty, three things can happen, all of them bad: reduced engine power, decreased throttle response and increased engine wear.

As a result, a key to peak engine performance is the flow of air to the ignition point. And 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.

Gaskets surrounding the filtering media provide a seal within the air intake chamber. Gaskets should remain flexible under cold conditions.

PremiumPLUS filtering media is specially designed to remove dirt from the air entering the engine. PremiumPLUS media provides the maximum amount of space to catch more airborne contaminants.

External Screen on round, radial and some panel air filters provides strength while allowing the free flow of air to the engine.