K&N® 33-2135 - 33 Series Air Filter

K&N Performance Air Intake Systems
K&N® - 33 Series Air FilterK&N® - 33 Series Air FilterK&N® - 33 Series Air Filter Installation InstructionsK&N® - 33 Series Air Filter Airflow TestK&N® - Cleaning GuideK&N® - Air Filter Overview 602x420K&N Authorized Dealer
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Product Details

33 Series Air Filter (33-2135) by K&N®. Get better performance, superior engine protection and more economical operation just by changing your air filter. The K&N air filter gives you increased airflow without sacrificing filtration ability. It's the last air filter you'll ever buy for your car.

K&N - F.A.Q. K&N - Air Filter Cleaning K&N - Warranty


  • Improves engine airflow
  • Increases horsepower and acceleration
  • Superior filtration without reduced airflow
  • Reduces maintenance costs
  • Washable and reusable
  • Get up to 50,000 miles between cleanings under normal driving conditions
  • Emissions legal in all States
  • Backed by K&N's Million Mile Limited Warranty

Most air filters on the market are a compromise. Many high-performance filters deliver better airflow, but sacrifice filtering ability and engine protection in the process. OEM filters, which are usually made of paper, filter adequately but at the expense of airflow. And airflow decreases as these air filters become dirty. Not so the K&N air filter. K&N air filters increase airflow without decreasing filtration ability, and the increased airflow remains consistent throughout the filter's service interval. The secret is in the K&N filter's construction.

K&N's initial goal was to develop a filter that would deliver increased airflow during dirty, dusty off-road racing conditions. Increased airflow improves the efficiency of the combustion process, increasing horsepower and torque. But just increasing airflow without ensuring adequate filtration under those conditions would result in a ruined engine. K&N's solution was a filter design consisting of 4 to 6 layers of cotton gauze sandwiched between two aluminum wire screens. The cotton is then treated with a specially formulated grade of oil that causes tackiness throughout the cotton’s microscopic strands. The resulting K&N filter not only delivers increased airflow while trapping dirt particles that could harm your engine, that level of airflow is maintained even as the filter gets dirty. The layers of oiled cotton fibers in the K&N filter trap dirt particles that are smaller than the holes in the filter media. The thickness of the layers also allows the K&N filter to trap dirt and dust on many levels, trapping more dirt without decreasing airflow. Contrast this with a paper filter that only traps dirt on its surface; as the surface area becomes clogged, the airflow rate goes down.

Each K&N air filter is custom designed to fit into your existing factory air box. The K&N filter is economical because it's the last air filter you'll have to buy for your car. It can be washed and reused many times, and since you can usually drive up to 50,000 miles between servicing, you won't have to clean it very often. And every K&N filter is backed by K&N's Million Mile Limited Warranty. By the way, check the CARiD reviews and read what the customers think of K&N porducts.

Brand: K&N       Part Number: 33-2135       UPC: 024844071897
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K&N® is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. The first K&N filter was conceived for racing over 40 years ago and a performance enthusiast mindset continues today throughout all levels of the company. K&N is the sales and brand leader for performance filters, including an extensive line of factory replacement filters and performance air intake kits. The company actively promotes the environmental, economical and performance advantages of long-life reusable cotton gauze filters.

Product Reviews (3)

Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

K&N® 33-2135 - 33 Series Air Filter
K&N® - 33 Series Air Filter
Average Rating:  4.5  4.5 of 5
Always a Great Product
2013 GMC Yukon Denali | Posted by | (Mattapan, MA)

I have always trusted K&N filters. As usual the quality was top notch and the fit was perfect. My Denali already has so much power that I can't tell if there is any increase. I am satisfied none the less.

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2013 Chevy Silverado | Posted by | (Telluride, CO)

Works simple, lets my baby breath easier. I live and drive at 8500-13k elev. and it showed improvement instantly. Had an fipk kit on my old truck and its been worked hard for 15 years with no issues on the kit.

3 people found this review helpful.
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Cadillac EXT
2008 Cadillac Escalade | Posted by | (Rochester, NY)

Installs fast and K&N quality. Very nice.

1 people found this review helpful.
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Vehicle FitmentThis part is compatible with 124 vehicle(s)
Year Make Model Fitment Notes
2015 Chevy Silverado 2500 HD / 3500 HD 6.0L
2015 GMC Sierra 6.0L
2015 GMC Sierra Denali 6.0L
2014 Cadillac Escalade / Escalade ESV
2014 Chevy Silverado 6.0L / 6.2L
2014 Chevy Suburban 2500
2014 Chevy Tahoe 6.0L
2014 GMC Sierra 6.0L / 6.2L
2014 GMC Sierra Denali 6.0L / 6.2L
2014 GMC Yukon XL 6.2L
2014 GMC Yukon Denali / Yukon XL Denali
2013 Cadillac Escalade / Escalade ESV / Escalade EXT
2013 Chevy Silverado 2500 HD / 3500 HD 6.0L
2013 Chevy Silverado 1500 6.0L / 6.2L
2013 Chevy Suburban 2500
2013 Chevy Tahoe 6.0L
2013 GMC Sierra 6.0L / 6.2L
2013 GMC Sierra Denali 6.0L / 6.2L
2013 GMC Yukon 6.0L
2013 GMC Yukon XL 6.0L / 6.2L
2013 GMC Yukon Denali / Yukon XL Denali
2012 Cadillac Escalade / Escalade ESV / Escalade EXT
2012 Chevy Silverado 2500 HD / 3500 HD 6.0L
2012 Chevy Silverado 1500 6.0L / 6.2L
2012 Chevy Suburban 2500
2012 Chevy Tahoe 6.0L
2012 GMC Sierra 6.0L / 6.2L
2012 GMC Sierra Denali 6.0L / 6.2L
2012 GMC Yukon / Yukon XL 6.0L / 6.2L
2012 GMC Yukon Denali Hybrid / Yukon XL Denali
2011 Cadillac Escalade / Escalade ESV / Escalade EXT
2011 Chevy Silverado 2500 HD / 3500 HD 6.0L
2011 Chevy Silverado 1500 6.0L / 6.2L
2011 Chevy Suburban 2500
2011 Chevy Tahoe 6.0L
2011 GMC Sierra 6.0L / 6.2L
2011 GMC Sierra Denali 6.0L / 6.2L
2011 GMC Yukon / Yukon XL 6.0L / 6.2L
2011 GMC Yukon Denali Hybrid / Yukon XL Denali
2010 Cadillac Escalade / Escalade ESV / Escalade EXT
2010 Chevy Silverado 6.0L / 6.2L
2010 Chevy Suburban 2500
2010 Chevy Tahoe 6.0L
2010 GMC Sierra 6.0L / 6.2L
2010 GMC Sierra Denali
2010 GMC Yukon 6.0L
2010 GMC Yukon XL 6.0L / 6.2L
2010 GMC Yukon Denali / Yukon Denali Hybrid / Yukon XL Denali
2009 Cadillac Escalade / Escalade ESV / Escalade EXT
2009 Chevy Avalanche 6.0L
2009 Chevy Silverado 6.0L / 6.2L
2009 Chevy Suburban 6.0L
2009 Chevy Tahoe 6.0L / 6.2L
2009 GMC Sierra 6.0L / 6.2L
2009 GMC Sierra Denali
2009 GMC Yukon / Yukon XL 6.0L
2009 GMC Yukon Denali / Yukon XL Denali
2008 Cadillac Escalade / Escalade ESV / Escalade EXT
2008 Chevy Avalanche 6.0L
2008 Chevy Silverado 6.0L
2008 Chevy Suburban 6.0L
2008 Chevy Tahoe 6.0L
2008 GMC Sierra 6.0L
2008 GMC Sierra Denali
2008 GMC Yukon / Yukon XL 6.0L
2008 GMC Yukon Denali / Yukon XL Denali
2007 Cadillac Escalade / Escalade ESV / Escalade EXT
2007 Chevy Avalanche 6.0L
2007 Chevy Silverado 6.0L / 8.1L
2007 Chevy Suburban 6.0L
2007 GMC Sierra 6.0L / 8.1L
2007 GMC Sierra Classic Denali / Sierra Denali
2007 GMC Yukon XL 6.0L
2007 GMC Yukon Denali / Yukon XL Denali
2006 Cadillac Escalade / Escalade ESV / Escalade EXT
2006 Chevy Avalanche 2500
2006 Chevy Silverado 6.0L / 8.1L
2006 Chevy Suburban 6.0L / 8.1L
2006 GMC Sierra 6.0L / 8.1L
2006 GMC Sierra Denali
2006 GMC Yukon XL 2500
2006 GMC Yukon Denali / Yukon XL Denali
2005 Cadillac Escalade / Escalade ESV / Escalade EXT
2005 Chevy Avalanche 2500
2005 Chevy Silverado 6.0L / 6.6L / 8.1L
2005 Chevy Suburban 2500
2005 GMC Sierra 6.0L / 6.6L / 8.1L
2005 GMC Sierra Denali
2005 GMC Yukon XL 2500
2005 GMC Yukon Denali / Yukon XL Denali
2004 Cadillac Escalade / Escalade ESV / Escalade EXT 6.0L
2004 Chevy Avalanche 2500
2004 Chevy Silverado 6.0L / 6.6L / 8.1L
2004 Chevy Suburban 2500
2004 GMC Sierra 2500 / 2500 HD / 3500
2004 GMC Sierra Denali
2004 GMC Yukon XL 2500
2004 GMC Yukon Denali / Yukon XL Denali
2003 Cadillac Escalade / Escalade ESV / Escalade EXT 6.0L
2003 Chevy Avalanche 2500
2003 Chevy Silverado 6.0L / 6.6L / 8.1L
2003 Chevy Suburban 2500
2003 GMC Sierra 1500 HD / 2500 / 2500 HD / 3500
2003 GMC Sierra Denali
2003 GMC Yukon XL 2500
2003 GMC Yukon Denali / Yukon XL Denali
2002 Cadillac Escalade / Escalade EXT 6.0L
2002 Chevy Avalanche 2500
2002 Chevy CK Pickup 8.1L
2002 Chevy Silverado 6.0L / 6.6L / 8.1L
2002 Chevy Suburban 2500
2002 GMC CK Pickup 8.1L
2002 GMC Sierra 1500 HD / 2500 / 2500 HD / 3500
2002 GMC Sierra Denali
2002 GMC Yukon XL 2500
2002 GMC Yukon Denali / Yukon XL Denali
2001 Chevy CK Pickup 8.1L
2001 Chevy Silverado 6.0L / 6.6L / 8.1L
2001 Chevy Suburban 2500
2001 GMC CK Pickup 8.1L
2001 GMC Sierra 1500 HD / 2500 / 2500 HD / 3500
2001 GMC Yukon XL 2500
2001 GMC Yukon Denali / Yukon XL Denali
2000 Chevy Silverado 6.0L
2000 Chevy Suburban 2500
2000 GMC Sierra 6.0L
2000 GMC Yukon XL 2500
1999 Chevy Silverado 6.0L
1999 GMC Sierra 6.0L
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Product Reviews (3)
Product Reviews (3)
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