|Item Weight||12.3 ounces|
|Product Dimensions||9.9 x 7.6 x 1.8 inches|
|Item model number||33-2231|
|Manufacturer Part Number||33-2231|
|OEM Part Number||33-2231|
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K&N 33-2231 High Performance Replacement Air Filter
|Price:||$48.99 & FREE Shipping on orders over $49. Details|
- Enter your model number above to make sure this fits.
- Designed to boost horsepower and rate of acceleration
- Can be cleaned and used again
- High air flow with exceptional filtration
- Lasts up to 50,000 miles before cleaning is required depending on driving conditions
- Works with original equipment manufacturer vehicle electronics
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From the Manufacturer
K&N OE Replacement High-Flow Air Filters
K&N automotive replacement air filters are designed to add horsepower and acceleration to your car or truck while providing exceptional engine protection. K&N replacement air filters are simple to install and backed by the K&N Million Mile Limited Warranty. Not only are K&N air filters washable and reusable, they can last up to 50,000 miles between servicing, depending on driving conditions.
Designed to Increase Horsepower with up to 50% More Airflow
K&N automotive OE (original equipment) replacement air filters generally add 1 to 4 horsepower, due to the unique characteristics of our filter media. K&N air filter media was originally developed for desert motocross racing. K&N air filters were created for an environment that required maximum horsepower and acceleration while protecting the engine from the dirt and dust of off-road racing. This resulted in an air filter designed to achieve high, virtually unrestricted air flow while protecting your engine for the life of your vehicle. K&N washable and reusable air filters are made up of four to six layers of cotton gauze layered between two sheets of epoxy-coated wire mesh. The media is pleated and oiled to enhance overall filtration and performance.
Washable High-Flow Cotton Filter Media
K&N washable and reusable air filters are handmade in the USA using only the finest materials. It is almost impossible to wash your K&N air filter or air cleaner too much. K&N washed and re-oiled one K&N air filter more than 100 times, inside our testing laboratory, and it still performs up to specification. K&N air filters can go up to 50,000 miles between cleaning, depending on your driving conditions. To clean and re-oil your K&N air filter, use a K&N Air Filter Cleaning Kit and use the easy to follow instructions.
10-Year/Million Mile Limited Warranty
K&N warrants its street vehicle OE (original equipment) replacement air filters for one million miles. If used properly and found to be defective, return your filter with the receipt from purchase and K&N will replace it free of charge. Incorrect Cleaning or Use Voids Warranty
K&N Air Filters should be cleaned every 50,000 miles for normal highway use, more often in dusty conditions. Cleaning should be done with K&N cleaner and air filter oil (or comparable air filter cleaner and oil). Use of compressed air, or chemicals not specifically designed to clean and re-oil cotton air filters (i.e. gasoline, transmission fluid, motor oil, lightweight oil, or diesel fuel) will void the warranty. Any damaged, abused or modified K&N Air Filters will not be warranted.
K&N Consumer Protection Pledge
The K&N Consumer Protection Plan goes a step further than the K&N Million Mile Limited Warranty. At times, the performance aftermarket has been plagued by automotive manufacturers and auto dealers that may attempt to discourage you from modifying your vehicle. They would prefer that you buy OE parts and not customize your car or truck and have even voided their own manufacturer's warranty due to vehicle modifications. K&N and the Magnuson-Moss Warranty Act protect consumers from such denied warranty claims. When you buy a K&N OE replacement air filter or air intake system you can be confident your vehicle's warranty will remain in effect. If you encounter a dealership that wants to void your warranty because of one of our products, K&N will resolve the issue so you won't have to. We believe that K&N makes one of the world's best Air Filter and we stand behind that claim 100 percent.
Also available: K&N Cabin Air Filters
The K&N Washable Cabin Air Filter is the first of its kind designed to replace your vehicle's stock cabin air filter with a washable and reusable version that cleans and freshens incoming air. K&N Cabin Air Filters are designed to be cleaned and reused over and over again. Using a combination of an advanced synthetic filter media and K&N Refresher spray, the K&N Washable Cabin Air Filter grabs and holds dust particles.
Cabin Air Filters
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Top Customer Reviews
I've noticed an obvious power increase and a moderate gas consumption improvement with this filter. This may have been the result of a badly restricted stock filter which had not been changed as scheduled on the warranted dealer maintenance program.
Overall I'm satisfied with the performance but will continue to monitor the filter as the weather changes and road dust becomes more of an issue in the drier months.
Most Recent Customer Reviews
This fit my 2006 BMW X3 3.0 perfectly. Although, if your warranty is up, I would recommend taking all the tubing out and getting a K&N cone filter instead. Read morePublished 10 days ago by Mark003
This fit perfectly on my 2001 BMW 330CI. Also I did notice an increase in my MPG and acceleration.Published 2 months ago by Kingsley Costain
Bought the K&N for the cost savings from cleaning, no noticeable MPG or powerPublished 3 months ago by Tony N.
Great product. Exactly what we were looking for. We searched other places but no one had stock. This was easy to install as well.Published 5 months ago by Mandi Cloud
Great product, I have used these in the past on two other vehicles. I saw an improvement in gas mileage when used on my BMW, and also some some mild improvements in power when... Read morePublished 6 months ago by JD
It does what it says for a great price. Ive used this as minimum "upgrade" on all my carsPublished 8 months ago by Adrian
I am a fan of K&N but this product does not fit properly on a E46 M3 airbox. Rubber along the edges is too thick, not allowing for proper seating of the airbox between the filter. Read morePublished 9 months ago by Collin Pyle