Why K&N Filters Flow More Air?

The Filtercharger, K&N Engineering's reusable air filter, first hit the automotive aftermarket in the spring of 1964 and instantly became an automotive aftermarket success. The Filtercharger's use of a special reusable cotton fabric sandwiched between pleated layers of aluminum screen wires represents a radical departure from conventional air filtration technology.

Conventional filters use paper or foam material in tiny irregular passages to trap incoming particles. The passages eventually become clogged and the filter is discarded. K&N Engineering developed the Filtercharger first for its performance capability and second as an economical and environmentally sound alternative to the traditional paper filter.

Performance is greatly improved with the K&N Filtercharger. The sandwiched layers of cotton gauze, specially treated with K&N air filter oil, provides five times more filtering surface over the element circumference. This serves to smooth incoming air flow while reducing intake restriction. The increased intake of non-turbulent air allows the engine to receive a larger, smoother gulp of air. The result is "free horsepower" and improved engine performance. Among racing professionals, the K&N Filtercharger is consistently mentioned as their air filter of choice.

For continued high performance service is recommended every 30,000 to 50,000 miles. To service, simply remove the Filtercharger, clean it with K&N biodegradable detergent, apply fresh K&N oil and reinstall.