K&N Air Filters - For over 35 years, K&N Engineering has been making filters with one compelling force in mind: the customer. How do we give the customer more horsepower? How do we improve the customer's driving efficiency? How do we satisfy the desire to be environmentally responsible? We continually seek answers to these questions using our world wide R&D facility equipped with multiple state-of-the-art Dynomometers. These Dynomometers are used to test a vehicle's power and emission. We also perform field testing - both in street and racing environments - conversing with both hard core enthusiasts and everyday users. This allows us to validate our internal research findings as well as receive customer feedback and input for products to meet customer's needs. and for added peace of mind, that cannot easily be offered by other manufacturers, K&N filters are tested by independent laboratories for air flow, filtering efficiency, and dust retention using standards set by the Society of Automotive Engineers (SAE). We are proud to say that from these inquiries, specifically with the SAE J726 air filter test, K&N filters have achieved an overall efficiency rating of over 99%!What have been the other results of our lifelong commitment to our customer's needs? The results have been to produce filters for a wide variety of applications and in such expansive markets as automotive, marine, industrial, small engine, powersports (motorcycles, ATVs, snowmobiles, go-karts), and the military. We also are committed to offer our customers filters that carry the following benefits:Washable and Re-usable - Simply wash, dry, and re-oil the element at regularly scheduled intervals and you can have clean air for as long as you have your car.Increase Mileage and Improve Fuel Economy - a Revolution In Air Filter TechnologyImproves Fuel Economy Increases Power Washable and Reusable Will NOT Void Vehicle Warranty Lasts up to 50, 000 miles before service is required Emission Legal in all 50 US States. 10 Year / Million Mile Limited Warranty Pleated Design Provides More Filtering Surface Works with Original Equipment Manufacturer Computer SystemsPit Stop USA offers K&N Air Filter Element w/ Wire Reinforcement - 14" x 6" E3770 at low everyday prices. Be sure to check out all of our products from K&N Filters including K&N Filters 14" x 6" Air Filters.