K&N 33-2385 High Performance Replacement Air filter

Designed to boost horsepower and rate of acceleration
Can be cleaned and used again
High air flow with exceptional filtration


K&N’s replacement air filters are designed to increase horsepower and acceleration even as providing excellent filtration. We make over 1,200 different replacement air filters for virtually each vehicle 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 get rid of 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.

K&N Engineering Inc.
Air Filter Details
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K&N Replacement Automotive Air Filters

The K&N High-Drift air filter is designed to succeed in high, virtually unrestricted air Drift even as maintaining filtration levels critical to verify long engine life. Our automotive OE (original equipment) replacement air filters typically add 1-4 horsepower. The name of the game to our success lies in the unique characteristics of our filter medium that used to be firstly developed by K&N all those years ago in the dust, sweat and tears of desert motocross racing. We just wanted to win races and stumbled on a cotton filtration technology destined to be great. Our high Drift cotton gauze air filter is washable, reusable and built to last for the life of an automotive or motorcycle engine. K&N air filters consist of four to six sheets of cotton gauze layered between two sheets of aluminum wire mesh. This media is then pleated and oiled to fortify its filtering capabilities and overall performance. K&N Air Filters were created for an environment requiring maximum horsepower and enhanced acceleration along with protection from the dirt and dust of off-road racing. The result is an air filter that allows dramatically more air into an engine, is washable and reusable, and will give protection to your engine for the life of your vehicle.

Designed to Increase Horsepower & Acceleration

K&N High-Drift Air Filter Features & Benefits
  • Will NOT Void Vehicle Warranty
  • Emissions Legal in all 50 US States
  • Economical, a K&N Air Filter Will Last the Life of Your Automobile, Motorcycle, or ATV
  • Easy to Install
Dyno Chart example

Dyno Chart example – 33-2360 with est. gain of 2.15 horsepower at 5695RPM on a 2009 Toyota Corolla 1.8L
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Airflow Comparison Chart

Results will vary depending on part number and vehicle.
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Engine Protection and Filtration

Anyone can Drift more air. The trick is to Drift more air safely. In our opinion we hit the sweet spot – an optimal blend of high air Drift, filtration efficiency, durability and dust capacity. We take filtration seriously. K&N Air Filter media has been tested both in-house and by independent labs the use of the ISO5011 test developed by the Society of Automotive Engineers. In addition we test many of our filters both out and in of the OE airbox ensuring proper fit and serve as. Our goal is to design filters with the maximum imaginable airflow achievable even as providing guaranteed engine protection.

The Importance of Oil

A K&N Air Filter is made of 4 to 6 layers of cotton gauze sandwiched between two epoxy-coated aluminum wire screens. The cotton is treated with a specially formulated grade of oil causing tackiness all the way through the cotton’s microscopic strands. The nature of the cotton allows high volumes of airflow, and when combined with the tackiness of the oil creates a powerful filtering media that ensures engine protection. In contrast, most other media can not handle the same balance of airflow and filtration all the way through the filter’s life without sacrificing one or the other. With a K&N Air Filter, there is not any sacrifice.

Never Replace Your Air Filter Again

Handmade in the united states and in the United Kingdom the use of only the finest materials, K&N OE Replacement Air Filters are washable and reusable. Irrespective of what you’ve heard, it’s almost not possible to wash your K&N Air Filter too much. Inside our testing laboratory, we have washed and re-oiled one K&N Air Filter more than 100 times and it still performs up to specification. Depending on your driving conditions, we recommend cleaning your air filter each 50,000 miles.

About K&N Engineering

K&N Engineering, of Riverside, California, is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. From humble beginnings as a circle of relatives run business over 35 years ago, K&N Engineering, now a in reality global company with offices in the United Kingdom and the Netherlands, continues to exist as a circle of relatives owned business with an enthusiast mindset and a right away connection with motor sports that carries over all the way through all levels of management and manufacturing.

Designed to spice up horsepower and rate of acceleration
Will also be cleaned and used again
High air Drift 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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