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K&N KN Universal Air Filter - Universal Filter Round Tapered 4in FlangeID / 6.625in Base OD / 5.25in Top OD / 9.5in Height

Part #: RC-4780
$78.99 For each
Fits On:
1996 Ford F-350, 1997 Ford F-350, 2003 Ford F-250 Super Duty, 2002 Ford F-250 Super Duty, 2001 Ford F-250 Super Duty, 2000 For... See more
Description:
K&N's Universal Air Filter features a round tapered design with a 4in flange ID, 6.625in base OD, 5.25in top OD, and 9.5in height, built with a molded pliable rubber flange that absorbs vibration and can stretch up to 1/16in to fit between sizes. It is washable and reusable.
K&N's Universal Air Filter features a round tapered design with a 4in flange ID, 6.625in base OD, 5.25in top OD, and 9.5in height, built with a molded pliable rubber flange that absorbs vibration and can stretch up to 1/16in to fit between sizes. It is washable and reusable.
K&N users would probably be surprised by the amount of air filtration testing and scientific research that goes on in K&N facilities as well as in independent laboratories. As the leader and originator of the high flow performance air filter they are always looking for new ways to provide excellent protection and maximum power for your car, truck, motorcycle, and just about anything else with an engine.
In 2005 more than 1600 vehicles were tested by K&N's R&D group on dynamometers in the US, United Kingdom, and the Netherlands. In addition to these power and torque tests, they also performed more than 110 filtration tests and more than 1,200 air flow tests with their in-house state-of-the-art test equipment. Simply put, if you buy a K&N airflow product, you are buying a product that will get you the most horsepower you can possibly get. Their engineers work tirelessly to make sure of it.
In 2005 more than 1600 vehicles were tested by K&N's R&D group on dynamometers in the US, United Kingdom, and the Netherlands. In addition to these power and torque tests, they also performed more than 110 filtration tests and more than 1,200 air flow tests with their in-house state-of-the-art test equipment. Simply put, if you buy a K&N airflow product, you are buying a product that will get you the most horsepower you can possibly get. Their engineers work tirelessly to make sure of it.
Q: What does an air filter do? Why purchase one?
A: An air filter protects against debris from getting into your engine. The factory air filter on your car is very restrictive, and buying an performance filter will generally help improve throttle response and add a pleasing induction sound to the engine under acceleration. An air filter can also significantly clean up the under-hood appearance of your car and make it easier to see and access components of your engine bay.
Q: How do you install an air filter?
A: It depends on what type of car you have and what type of air filter you get. A drop-in air filter is installed by opening up your stock air box, pulling out your factory paper filter and replacing it with the new high flow unit. If you opt for the open-element air filter, then your whole air box should be removed and replaced with the new filter. If the filter is universal (not vehicle-specific), slight modifications using reducers and couplers may be needed depending on the size of the filter and intake hosing.
A: An air filter protects against debris from getting into your engine. The factory air filter on your car is very restrictive, and buying an performance filter will generally help improve throttle response and add a pleasing induction sound to the engine under acceleration. An air filter can also significantly clean up the under-hood appearance of your car and make it easier to see and access components of your engine bay.
Q: How do you install an air filter?
A: It depends on what type of car you have and what type of air filter you get. A drop-in air filter is installed by opening up your stock air box, pulling out your factory paper filter and replacing it with the new high flow unit. If you opt for the open-element air filter, then your whole air box should be removed and replaced with the new filter. If the filter is universal (not vehicle-specific), slight modifications using reducers and couplers may be needed depending on the size of the filter and intake hosing.
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