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Air Filters

Two main types of air filters are used in automobiles: the combustion air filter, and the cabin air filter. The combustion air filter prevents particulate matter from entering the engine's combustion chambers. This filter is commonly changed at oil-change time, but may be changed at longer or shorter intervals, depending on operating conditions of the vehicle.
Most modern, fuel-injected vehicles use a flat panel filter. This filter is usually placed inside a plastic box connected to the throttle body with a large hose. Occasionally these are replaced with a conical filter and cold air intake which, in most cases, includes a heat shield to protect the intake air from under hood temperatures, along with tubing to improve airflow into the throttle body. In many cases an improved air-intake system can produce an increase in power and efficiency.
Older vehicles that use carburetors or throttle body fuel injection typically use a cylindrical air filter, usually a few inches high and approximately a foot in diameter (the most common version is 14 inches in diameter and 3 inches tall). This is positioned above the carburetor or throttle body and secured with a metal lid. Replacing this lid with a chrome-plated version is a common and simple modification among car enthusiasts.
The cabin air filter is typically a pleated-paper filter that is placed in the "outside-air" intake for the vehicle's passenger compartment. Some of these filters are rectangular and similar in shape to the combustion air filter. Others, such as in the Ford Taurus, are roughly triangular in shape, so as to fit in the narrow curving space of the outside-air intake. Cabin air filter replacement has recently become an opportunity for increased billings and profits at professional oil-change locations. Improper removal and reinstallation of this filter can lead to water leaks (by misalignment of the water diverter or seals) and in rare instances, a cracked windshield. This filter is often overlooked and clogged or dirty cabin air filters can significantly reduce airflow from the cabin vents, as well as introduce allergens into the cabin air stream. Periodic, proper replacement will increase cooling and heating efficiency. A filter should be replaced annually to ensure optimal efficiency. Drivers can change their own filters or have the service done for them at an automotive service center.

Tray Filter
Tray Air Filters Replacement Air Filters for Street Legal Vehicles - K&N Replacement Air Filters are designed to fit right into the standard OEM motorcar air box.  No modifications are required by the owner, no jet changes or adjustment of the carburetors is anticipated or suggested. Customer modification of the standard air box - removing the cover, drilling holes into the side or top will have a drastic effect on smooth carburetion.  Modifications will cause the stock system to run lean and reduce horsepower.  Keep your engine stock and the new K&N Replacement Element will be good for the life of the engine.
Pod Filter
Air Filters Each kit is proven on a rear-wheel dynamometer to increase horsepower and torque. Typhoon intakes come in one of three designs; cold air intakes (CA), short ram intakes (SR), or complete cold air (CCA) intakes which can be configured as either a cold air intake or a short ram intake.  Available in an assortment of powder coated colors and polished aluminum, these kits are sure to please in every way.  They come with an oversized High-Flow conical air filter designed to provide increased surface area and dust capacity. This extra surface area provides even more airflow at lower restriction than a standard K&N O/E replacement filter that is limited to the size of the factory air box. The oversize air filter also captures more dirt increasing the service life before a cleaning is required (up to 100,000 miles).

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