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K&N 33-2921 Air Filter

Replacement Filters > Replacement Air Filter
  • 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®
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.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.91 oz (27 ml)
Height0.813 in (21 mm)
Outside Length10.938 in (278 mm)
Outside Width6.375 in (162 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height13.56 in (345 mm)
Product Box Length7.72 in (196 mm)
Product Box Width1.75 in (44 mm)
Product StylePanel Air Filter
Weight1 lb (0.5 kg)

Customer Feedback

Couple of days back my son purchased a K&N filter (part 33-2921) and fixed in our INDICA-VISTA 2009 limited edition. According to him the car's pick-up has increased and having a smooth drive.

Mohamed Ali
Doha - Qatar
Hello K&N,
I am ecstatic with your product, allow me to explain why.
I own a Tata sedan (Indigo LX TDi, October 2005, 70000kms)
After 65000+ kms, I found the car had given me a drop in performance - power and fuel efficiency.
Kumar, from Methods Automotive, is a friend who I have relied on for suggestions on performance tuning for my car. He helped me install your OEM Stock Replacement Filter.
The mileage in city has gone up from 14kmpl to 17kmpl, and on highways from 18kmpl to 24kmpl.
The power response has also gone up and the car is super smooth in power delivery.
WOW! Great product!
I plan to install it on my 12 year old TVS-Suzuki Shaolin bike (2 stroke, 140cc, September 1997)


Bangalore, India
Thank you K&N. I have a Tata Indica Xeta. It's a little lazy car so I got the header changed. Still I was losing horsepower. I have been a big fan of K&N. My bike and my old car had it. I checked in the market and did not find a filter that fits the need. So I got a universal filter shiped to India from the U.S. Now my car gets a lot of cool air, the motor doesn't get too heated up, and my header sounds like heaven to me. Thank you for making such a cool filter. Regards.

Hyderabad, India