K&N E-0668

Replacement Filters > Replacement Air Filter
List Price: $474.83
Your Price: USD $261.99

You Save 44.8%

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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 ShapeRound Straight
Filter MaterialCotton Gauze
Height6.625 in (168 mm)
Package Contents2 Air Filters
Package Quantity2
Product Box Height12.06 in (306 mm)
Product Box Length12.06 in (306 mm)
Product Box Width6.13 in (156 mm)
Product StyleUnique Air Filters
This Product Includes2 Filters
Weight2.5 lb (1.1 kg)

Customer Feedback

Be the first to review part E-0668
Instant low end power boost and a throaty sound for my Audi A5 2.0T; I recommend this air filter.

Joe Galdo
Jackson, New Jersey
I purchased the E-1987 air filter for my 2012 Audi Q5. Installation was easy, just needed to take the plastic air box on the left side of the engine compartment apart, swap the filter out, and put the box back together. It only took about 15 minutes. The K&N filter provides a little throatier sound plus it seems to make the engine a little bit more responsive than with the OEM filter. Haven't really noticed a change in MPG, if there is any it's negligible. Given that I'll never need to change the air filter in this vehicle again, plus with the other minor improvements I mentioned, to me it's well worth the purchase price.

Fred Gervais
La Crescenta, California
The air filter is so much better than the standard air filter I had fitted. My Audi TT seems quicker and more responsive. I would also like to add, the gent I spoke to over the phone was very professional, helpful and well spoken which made a nice change. If I could I would of given K&N 6 stars. I am also very happy to not have to buy another air filter for my car.

Steve Perry
Essex, United Kingdom