K&N 33-2031-2 Replacement Air Filter | 
| Brand: K&N
List Price: $63.40
Buy New: $43.95
You Save: $19.45 (31%)
New (130) from $43.95
Rating:  14 reviews
Sales Rank: 536
Media: Misc.
Shipping Weight (lbs): 1.2
Dimensions (in): 13.5 x 7.8 x 1.8
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MPN: 3320312
Model: 33-2031-2
UPC: 024844071873
EAN: 0024844071873
ASIN: B000182DPG
Availability: Usually ships in 1-2 business days
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| Features:
| • | A high-flow, washable filter that delivers the maximum amount of air possible into your engine while providing superior filtering | | • | Multiple layers of cotton fabric sandwiched between pleated aluminum screen capture airborne dirt particles | | • | Improves horsepower and torque | | • | Emission legal in all 50 states, will not void manufacturer's warranty | | • | Filters can be cleaned over and over, and are backed by a million mile limited warranty |
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| Editorial Reviews:
Product Description
These reusable K&N Filtercharger air filters outflow any other filter--up to 900 cfm--for power gains of up to 15 HP. They use a surgical cotton fabric soaked in oil as their tack barrier. Sandwiched between an aluminum screen wire, the holes in the cotton catch tumbling air and straighten it out. Since air moving in a straight line flows faster, the filter actually improves airflow. They can be covered by up to 1/4 in. of debris before air restriction makes cleaning necessary. The filters come pre-oiled, and many are available as a direct fit for your application.
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| Customer Reviews: Read 9 more reviews...
 Mo' power! March 16, 2007
Jay (San Diego, CA USA)
2 out of 2 found this review helpful
As always, K&N didn't let me down. On their website they showed a 5% gain in HP on the high end, but because of my family's history with K&N I bought the filter anyway. I did notice a bit more pickup in my X-Terra, but the real benefit is the increased power on demand. The lag I was used to between hitting the gas and feeling the acceleration have dropped considerably. A great advantage when you have to maneuver quick!
 The Original High-Flow Air Filter May 12, 2007
R. ang (Santa Ana, CA USA)
1 out of 1 found this review helpful
The Original High-Flow Air Filter
* High Air Flow with Excellent Filtration
* Designed to Increase Horsepower and Acceleration
* Washable and Reusable
* Will NOT Void Vehicle Warranty
* Lasts up to 50,000 miles before cleaning is required depending on driving conditions
* K&N Million Mile Limited Warranty
* Emissions Legal in all 50 US States.
* Economical, a K&N Air Filter Will Last the Life of Your Automobile, Motorcycle, or ATV
* Works with Original Equipment Manufacturer Vehicle Electronics
* Easy High Performance Add-on
* Environmentally Friendly
Better air flow and acceleration! May 23, 2007
J. Watson (Sin City, USA)
1 out of 1 found this review helpful
After replacing my stock air filter with the K & N I did notice better acceleration through the gears, along with slightly increased gas mileage. Also, I think the price compares to about 2-3 regular air filters, so it pays for itself anyway after only a few years. Add this to the mileage you gain and it's a rockin' good deal!
Good! September 17, 2007
DJ Max (northern CAL, USA)
1 out of 1 found this review helpful
Just purchased it about 2 weeks ago, will need more time, but there are noticable differences: Alittle more noticable horsepower when I needed it and my gas mileage went up, meaning less time at the gas station! Worth the purchase!
K&N 33-2031-2 Air Filter January 7, 2008
Notman (Nashville, TN)
1 out of 1 found this review helpful
Replaced standard air filter in a 2004 Nissan Frontier Crew Cab V6 5-Speed - Consistently get 20 MPG (High end for rated Mfg MPG) for combo city/hwy driving, and I do not drive conservatively. I do not have previous data, as I just bought truck (Used). Great throttle response. K&N have a superior reputation. Amazon saved me approx. $15.00 over local auto stores.
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