K&N 33-2304 High Performance Replacement Air Filter

by K&N

Product 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

Product Details

• Product Dimensions: 11.6 x 10.4 x 1.8 inches ; 14.2 ounces
• Shipping Weight: 15.2 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000COC0GQ
• Item model number: 33-2304
• Average Customer Review: 4.3 out of 5 stars  See all reviews (34 customer reviews)
• Amazon Best Sellers Rank: #475 in Automotive (See Top 100 in Automotive)
  • #6 in Automotive > Performance Parts & Accessories > Filters > Air Filters & Accessories > Air Filters
  • #7 in Automotive > Replacement Parts > Filters > Air Filters & Accessories > Air Filters

Product Description

K&N's lifetime replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. The air filter is custom-designed to fit into your existing factory air box and the drop-in design means adding performance is simple. The unique design of the air filter features multiple layers of cotton fabric which capture airborne dirt particles. The filter is washable and reusable and can be easily cleaned and oiled. It lasts up to 50,000 miles before cleaning is needed.

Customer Reviews

Most Helpful Customer Reviews

4 of 4 people found the following review helpful:

5.0 out of 5 stars 1 MPG improvement, August 2, 2009

By 

Mark Crandell - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: K&N 33-2304 High Performance Replacement Air Filter (Misc.)

I recommend this product, but only experienced 1mpg improvement in city driving, not sure if it made any difference on highway driving. Fit was perfect and I like the idea that I can wash the filter and not worry about buying a new one. My car is a Subaru Impreza 2.5i 2008

3 of 3 people found the following review helpful:

5.0 out of 5 stars Air Filter, February 7, 2011

By 

Paige (salt lake city, utah) - See all my reviews

Amazon Verified Purchase

This review is from: K&N 33-2304 High Performance Replacement Air Filter (Misc.)

First and foremost, I'm not a car buff. I have bought a K&N filter for all of my vehicles and so I did with my 05 subaru outback xt. This was the correct filter and took me a little bit to get it installed. Does it improve gas mileage? According to my car's computer computed gas mileage, it has remained on avg about the same (Maybe a .2-.3 increase). This is hard to measure as it could be a number of different things. Does it increase performance, I can honestly say that it does feel like it breathes better and it also feels like it has a bit more pull from the low end. Is this in my head? Probably but then again, I don't have to keep buying cheap filters from the oil change places or the dealer. I've been happy with k&n parts and will continue to buy them even if its just a feeling.

Product was exactly as advertised and Amazon Prime is the main reason I shop Amazon. I love it! Keep up the good work.

7 of 9 people found the following review helpful:

5.0 out of 5 stars Great - But Not a Magic Bullet, April 20, 2010

By 

C. Mclean (New Brunswick Canada) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: K&N 33-2304 High Performance Replacement Air Filter (Misc.)

Perfect for my Subaru. Make no mistake, K & N filters are top notch, but beware of people who claim huge improvements in mileage and power (i.e. 10-15%). With the billions of dollars the auto industry has spent trying to improve gas mileage and power, every car made in the world would have these as original equipment if such gains were possible. If life were only so simple. People who replace a CLOGGED filter with a new one will notice an improvement, no matter what NEW CLEAN filter they use. If it's clogged badly enough, the improvement might be that your car runs now). But K & N is definitely better than most in fit and quality, plus being reusable, but a magic bullet it is not. A clogged K & N filter will also cause performance problems, it's just that all you have to do is clean it properly, and you are off and running; whereas with a paper filter, you have to throw it out. Worth the money, especially at 25-30 bucks.