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Replacement Filters > Replacement Air Filter

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33-2078
 
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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]
Available Information
33-2078 Cross Reference
Installation Instruction Sheet
33-2078 Vehicle Applications


Part 33-2078 Product Specifications
Product Style: Panel Air Filter
Height: 1.063 in (27 mm)
Outside Length: 12.75 in (324 mm)
Outside Width: 5.75 in (146 mm)
Air Filter Shape: Panel
Filter Material: Cotton Gauze
Package Contents: 1 Air Filter
Package Quantity: 1
Filter Re-Oiling Amount: 1.19 oz (35 ml)
Inner Wire: No
Top Style: Open
Weight: 1.3 lb (0.6 kg)
Product Box Length: 7.72 in (196 mm)
Product Box Width: 1.75 in (44 mm)
Product Box Height: 13.56 in (345 mm)



Accessories
99-5050.jpg
99-5050 - Filter Care Service Kit - Squeeze

Customer Feedback      Be the first to review part 33-2078

Update on my July 15, 2003 submission to K & N on my results

To Whom IT May Concern,
I must say that I am very impressed with your product. When I installed part number 33-2277 on my 2003 Honda Accord EX V6, I initially tested its performance on a closed track. Well after some additional testing recently, something interesting was discovered. On a certified Dyno machine, the stock wheel horse power and torque increased from 204.5 hp and 180.7 ft/lbs to 216.3 hp and 191.4 ft/lbs! The flywheel horse power rating at 240 hp is likely 250 hp using the standard calculations. What was most interesting is how the power curve changed. The engine developed a flatter torque curve with a peak at 4,750 rpm as opposed to the 5,000 rpm stock reading. The same results followed with the horse power delivery. I don't believe hype, so the math results tell the story. After using this product for 90 days, I re-tested the performance results at the same track, and here is what happened:

0-60 7.0 seconds stock

0-60 6.87 seconds K & N installed July 2003

0-60 6.63 seconds K & N after 90 days


1/4 mile 15.5 seconds @ 92 mph stock

1/4 mile 15.1 seconds @ 94.2 mph K & N installed July 2003

1/4 mile 14.8 seconds @ 97.8 mph K & N after 90 days


Top Speed (certified with a calibrated and properly operated radar gun)

138 mph stock

143 mph K & N installed July 2003

146 mph K & N after 90 days


Gas Mileage (measured with the on-board Honda Navigation and mileage calculators)

25.0 mpg city, 31.0 mpg highway stock

26.0 mpg city, 33.5 mpg highway K & N installed July 2003

26.4 mpg city, 33.7 mpg highway K & N after 90 days

Note: When the testing was being completed, the gas mileage for that day was 17.2 mpg. Obviously, this type of driving was not usual and customary, and thus was not included in the overall gas mileage calculations.

Additional testing was conducted and across the board increases in performance in 5-60, 20-40, 30-50, and 0-100 mph tests were very apparent. I have discussed my findings with some Honda experts and they say that part of the results should be credited to the on board computers for the car. They say that engine computers have likely remapped the fuel/air mixtures to take advantage of the new levels of air available in the intake as a result of the use of your product. This makes sense to me. My neighbor installed a K & N filter in his BMW M5 and ZO6 Corvette and saw similar performance increases. I hope that anyone who reads this testimonial understands that these results are facts, that should be easily repeatable with other vehicles.
David, Chappaqua, New York
The air filter works well in my son's BMW 330ix.
Mark Putnam, Orange, Virginia
I bought this filter to replace the stock one in my 2009 BMW. The K&N filter fit perfectly and didn't produce any error codes with the electronics.
Terry Malcolm, Nebraska

K&N 33-2078 fits the following:
1996 BMW 525IX 2.5L L6 F/I - All
1996 BMW 525I 2.5L L6 F/I - All
1996 BMW 520I 2.0L L6 F/I - E34
1995 BMW M5 3.8L L6 F/I - All
1995 BMW 525IX 2.5L L6 F/I - All
1995 BMW 525IT 2.5L L6 F/I - All
1995 BMW 525I 2.5L L6 F/I - All
1995 BMW 520I 2.0L L6 F/I - All
1994 BMW M5 3.8L L6 F/I - All
1994 BMW 525IX 2.5L L6 F/I - All
1994 BMW 525IT 2.5L L6 F/I - All
1994 BMW 525I 2.5L L6 F/I - All
1994 BMW 520I 2.0L L6 F/I - All
1993 BMW M5 3.8L L6 F/I - All
1993 BMW M5 3.6L L6 F/I - All
1993 BMW 525IX 2.5L L6 F/I - All
1993 BMW 525IT 2.5L L6 F/I - All
1993 BMW 525I 2.5L L6 F/I - All
1993 BMW 520I 2.0L L6 F/I - All
1992 BMW M5 3.8L L6 F/I - All
1992 BMW M5 3.6L L6 F/I - All
1992 BMW M5 3.5L L6 F/I - All
1992 BMW 525IX 2.5L L6 F/I - All
1992 BMW 525I 2.5L L6 F/I - All
1992 BMW 520I 2.0L L6 F/I - All
1991 BMW M5 3.6L L6 F/I - All
1991 BMW M5 3.5L L6 F/I - All
1991 BMW 525IX 2.5L L6 F/I - All
1991 BMW 525I 2.5L L6 F/I - 170BHP
1991 BMW 520I 2.0L L6 F/I - 150BHP
1990 BMW M5 3.5L L6 F/I - All
1990 BMW 525I 2.5L L6 F/I - 192BHP
1990 BMW 520I 2.0L L6 F/I - 150BHP
1989 BMW M5 3.5L L6 F/I - All
1989 BMW 525I 2.5L L6 F/I - 192BHP
1989 BMW 520I 2.0L L6 F/I - 150BHP
1988 BMW M5 3.5L L6 F/I - Non-US