Replacement Air Filter
Hover over the image to zoom in
Share this:

K&N Replacement Air Filter

Part No. 33-2304 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

Product Features:
  • This is the last air filter your vehicle will ever need!
  • 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
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty┬«
Back To Top
Height:0.938 in
Material:Cotton Gauze
Outside Length:8.75 in
Outside Width:8.563 in
Shape:Panel

REVIEW SNAPSHOT®

by PowerReviews
K&NReplacement Air Filter
 
4.9

(based on 20 reviews)

Ratings Distribution

  • 5 Stars

     

    (18)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Durable (12)
  • Easy to use (11)
  • High-performance (11)
  • Lightweight (3)
  • Versatile (3)

Cons

No Cons

Best Uses

  • Large cars (11)
  • Small cars (9)
  • Trucks (8)
    • Car & Truck:
    • Casual driver (3)
    • Reviewer Profile:
    • Auto enthusiast (7), Casual driver (6)
    • Was this a gift?:
    • No (17)

Reviewed by 20 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

Surprisingly good upgrade for '17 WRX

By 

from Ri

Verified Buyer

Pros

  • Driveability
  • Response
  • Sound

Cons

    Best Uses

      Comments about K&N Replacement Air Filter:

      I have a '17 WRX and this was a surprisingly cheap and useful mod. Throttle response and sound both improved. Def helps with the 4K "wall hit", smooths it out a bit.

      • Was this a gift?:
      • No
       
      5.0

      Works better than expected.

      By 

      from North Wales, PA

      Verified Buyer

      Comments about K&N Replacement Air Filter:

      I have had this on the car a few days and I can already see a huge difference in throttle response. Worth the price for sure.

      • Was this a gift?:
      • No
       
      5.0

      The best filter around

      By 

      from G-man

      Verified Buyer

      Comments about K&N Replacement Air Filter:

      Just like everything else you pay for the best

      • Was this a gift?:
      • No
       
      5.0

      5 stars

      By 

      from New Jersey

      Verified Buyer

      Comments about K&N Replacement Air Filter:

      Easy to instal, great price. Wouldn't buy another filter then KN.

      • Was this a gift?:
      • No
       
      5.0

      K&N Replacement Air Filter

      By 

      from Elyria, OH

      About Me Casual Driver

      Verified Buyer

      Pros

      • Durable
      • Easy To Use
      • High-Performance
      • Versatile

      Cons

        Best Uses

        • Large Cars
        • Small Cars

        Comments about K&N Replacement Air Filter:

        This is the first time I purchased a K&N Air Filter. I purchased it because it received good reviews and it's reusable..

        • Was this a gift?:
        • No
         
        5.0

        great filter

        By 

        from new jersey

        About Me Auto Enthusiast

        Verified Buyer

        Pros

        • Durable
        • Easy To Use
        • High-Performance

        Cons

          Best Uses

          • Large Cars
          • Small Cars
          • Trucks

          Comments about K&N Replacement Air Filter:

          easy to install great fit

           
          5.0

          Great

          By 

          from Ma

          See all my reviews

          3 or more reviews submitted

          Comments about K&N Replacement Air Filter:

          Fit my 2013 crosstrek just fine.

           
          5.0

          2009 Subaru Tribeca

          By 

          from Elkhart, IN

          About Me Casual Driver

          See all my reviews

          3 or more reviews submitted

          Pros

          • Easy To Use

          Cons

            Best Uses

              Comments about K&N Replacement Air Filter:

              Fit perfect in the 2009 Subaru Tribeca.

              • Was this a gift?:
              • No
               
              5.0

              3rd one in 3 different cars

              By 

              from Aurora CO

              About Me Casual Driver

              Verified Buyer

              Pros

              • Easy To Use
              • High-Performance

              Cons

                Best Uses

                • Large Cars
                • Small Cars
                • Trucks

                Comments about K&N Replacement Air Filter:

                Better performance

                • Was this a gift?:
                • No

                (6 of 11 customers found this review helpful)

                 
                5.0

                great filter

                By 

                from harveys lake,pa

                About Me Auto Enthusiast, Casual Driver

                Verified Buyer
                Helpful Reviewer

                Pros

                • Durable
                • Easy To Use
                • High-Performance

                Cons

                  Best Uses

                  • Large Cars
                  • Small Cars
                  • Trucks

                  Comments about K&N Replacement Air Filter:

                  exact fit.already seen a slight improvement in my mpg.

                  • Was this a gift?:
                  • No

                  Displaying reviews 1-10

                  Back to top

                  Previous | Next »

                   
                   
                  Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.