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K&N 33-2121-1 Be the first to review!
Replacement Filters > Replacement Air Filter

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33-2121-1
 
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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 virtually every 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 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 Replacement Air Filters]
  • 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®
Available Information
33-2121-1 Cross Reference
Installation Instruction Sheet
33-2121-1 Vehicle Applications
News Story - Chevrolet Malibu Products for Performance and Protection
News Story - Pontiac Grand Am Finds Aftermarket Advantage with K&N Performance Products


Part 33-2121-1 Product Specifications
Product Style: Panel Air Filter
Height: 1 in (25 mm)
Outside Length: 12.813 in (325 mm)
Outside Width: 7.688 in (195 mm)
Air Filter Shape: Panel
Filter Material: Cotton Gauze
Package Contents: 1 Air Filter
Package Quantity: 1
Filter Re-Oiling Amount: 1.46 oz (43 ml)
Weight: 1.4 lb (0.6 kg)
Product Box Length: 8.31 in (211 mm)
Product Box Width: 1.75 in (44 mm)
Product Box Height: 17.19 in (437 mm)



Customer Feedback      Be the first to review part 33-2121-1

I recently purchased a K&N air filter and oil filter for my 2002 Pontiac Grand Am GT. I noticed great power increase as well as an improvement on fuel economy. After dyno tuning my Grand AM GT I found it was making 248 HP and 261 tq. The engine stock makes 190HP and 210 tq, and my only modifications are Bosch plus 4 spark plugs, 8mm wires and the K&N filter (as well as the tune). no doubt that the filter had a lot to do with it!! Thanks K&N for making a quality product I can trust. I am now putting your filters in my other cars as well. THANKS!!
Tom Theodoropoulos, Schaumburg, Illinois
Before I got my K&N air filter for my 2001 Chevy Malibu LS I was driving very economically, all light on the gas and whatnot, and was getting about 25 miles to the gallon.  The first fill up after I was running with the K&N, this was including the enjoyment of the extra power too, I was getting 30 miles to the gallon! So it looks like K&N here is a keeper and I plan to keep on using!
Eric Mehring, Platteville, Wisconsin
Well,
after an easy stock replacement filter change (K&N part 33-2121-1), my Malibu seems to respond easier with less effort, breathing better with a power reserve not before available. For me, it took about 20 miles for the engine electronics to adjust to a better air intake flow.

In all honesty, I would give this item a 5 out of 5 stars.
M. Hunt, Ormond Beach, Florida