Increases Air Flow for Better Combustion Efficiency
What's in the Box
(1) K&N Air Filter
(1) K&N Window Decal
(1) K&N Air Box Decal
(1) Million Mile Warranty Card
(1) Installation Instructions
K&N - The World's Best Air Filter
K&N’s lifetime replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. K&N air filters are custom designed to fit into your Mustang's factory air box. Their drop-in design means adding performance is simple. Simply remove the disposable air filter from your Mustang and replace it with a K&N; there is NEVER any cutting or fitting required. K&N stock replacement air filters for Ford Mustangs are covered by the famous K&N Million-Mile Limited Warranty and will be THE LAST AIR FILTER YOUR MUSTANG WILL EVER NEED.
Why is Air Flow Important?
More air entering your Mustang's engine can increase combustion efficiency, resulting in more horsepower and acceleration. K&N air filters are designed to reduce air restriction allowing your Mustang's engine to breathe more air. A clogged air filter can have so much restriction that it can even degrade your gas mileage. Remember.. a Mustang engine with a restrictive air filter is like a person breathing through a straw.
An Ecological Alternative to Disposable Air Filters
Over 100 million disposable air filters are discarded each year. K&N invented the reusable cotton air filter to help reduce this waste burden, and have sold over 20 million since 1969. A K&N air filter is cleanable and will last for the life of your Mustang. Instead of paper or synthetic materials, K&N uses multiple layers of threaded cotton gauze. The natural characteristics of cotton help to create a remarkable filter that can provide outstanding filtration and very high flow rates.
Clean Every 50,000 Miles
This filter requires cleaning every 50,000 miles for highway use, more often in dusty or for lowest restriction.
K&N Air Filter are Tough on Dirt
Thousands of microscopic cotton threads absorb K&N's specially formulated oil to create a powerful filtering medium. As part of their ongoing commitment to protect your Mustang's engine, K&N verifies their filtration efficiency using the ISO 5011 text protocol.
K&N's Million Mile Limited Warranty
K&N replacement air filters are built so well, that they warranty them for 1,000,000 miles! This means you can count on them to continue delivering engine protection and high airflow for the life of your Mustang.
K&N E-1931 Product Specifications
Product Style: Oval Air Filter
Height: 4.25 in (108 mm)
Inner Wire: No
Inside Length: 6.625 in (168 mm)
Inside Width: 3.813 in (97 mm)
Outside Length: 7.875 in (200 mm)
Outside Width: 5.063 in (129 mm)
Top Style: Open
Top Material/Finish: None
Filter Re-Oiling Amount: 1.41 oz (42 ml)
Weight: 1 lb (0.5 kg)
K&N E-1931 Vehicle Applications
1989 MERKUR XR4TI 2.3L L4 F/I - All
1988 FORD THUNDERBIRD 2.3L L4 F/I - All
1988 MERKUR XR4TI 2.3L L4 F/I - All
1987 FORD THUNDERBIRD 2.3L L4 F/I - All
1987 MERKUR XR4TI 2.3L L4 F/I - All
1986 FORD MUSTANG 2.3L L4 F/I - All
1986 FORD THUNDERBIRD 2.3L L4 F/I - All
1986 MERCURY COUGAR 2.3L L4 F/I - All
1986 MERKUR XR4TI 2.3L L4 F/I - All
1985 FORD MUSTANG 2.3L L4 F/I - All
1985 FORD THUNDERBIRD 2.3L L4 F/I - All
1985 MERCURY COUGAR 2.3L L4 F/I - All
1985 MERKUR XR4TI 2.3L L4 F/I - All
1984 FORD MUSTANG 2.3L L4 F/I - All
1984 FORD THUNDERBIRD 2.3L L4 F/I - All
1984 MERCURY CAPRI 2.3L L4 F/I - All
1984 MERCURY COUGAR 2.3L L4 F/I - All
1983 FORD MUSTANG 2.3L L4 F/I - All
1983 FORD THUNDERBIRD 2.3L L4 F/I - All
1983 MERCURY CAPRI 2.3L L4 F/I - All
1983 MERCURY COUGAR 2.3L L4 F/I - Turbo
K&N - The Worlds Best Air Filter
K&N Engineering is the inventor and leading innovator of reusable cotton gauze air filtration technology.
Designed to increase your Mustang or Lightnings horsepower and acceleration while providing excellent filtration. These filters are washable, reusable and built to last for the life of an automotive engine.
K&N filter elements consist of four to six sheets of cotton gauze layered between two sheets of aluminum wire mesh. This media is then pleated and oiled to enhance its filtering capabilities and overall performance.
The result is a performance air filter that allows more air into your engine, never needs replacing, and will protect your engine for the life of your Mustang.