K&N E-9178

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   2 Customer Reviews
List Price: $98.92
Your Price: USD $63.99

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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 K&N 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®

Product Specifications

Air Filter ShapeOval
Filter MaterialCotton Gauze
Filter Re-Oiling Amount1.12 oz (33 ml)
Height2.25 in (57 mm)
Inner WireNo
Inside Length15.75 in (400 mm)
Inside Width8.125 in (206 mm)
Outside Length17.5 in (445 mm)
Outside Width9.875 in (251 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height2.88 in (73 mm)
Product Box Length20.5 in (521 mm)
Product Box Width12.75 in (324 mm)
Product StyleOval Air Filter
Top Material/FinishNone
Top StyleOpen
Weight1.6 lb (0.7 kg)

Product Reviews

Review part E-9178
Saturday, June 27, 2015 - Part E-9178
I own a European version Mercedes w124 230E. This is a 2.3 liter, 4 cylinder M102 engine. With the K&N filter instantly power was increased specially at high revs. Mileage also increased specially on the road, perhaps a little in town. Though do not expect to convert your car engine into a V8.

Juan Garica
Tuesday, December 03, 2013 - Part E-9178
It installed as easily as the OEM filters. I noticed an immediate increase in performance. I haven't checked the mileage yet, but I also expect a small boost there as well. Highly recommend K&N filters!

Kenneth Stubert
Georgetown, Texas