SEARCH BY VEHICLE
E-2021
$50.99 USD
MSRP $78.99 35.4% Off
Free Ground Shipping!
In Stock & Ready to Ship!
Find a Dealer

K&N E-2021 Air Filter

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
  • 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®
The K&N E-2021 Air Filter fits some BMW 116i, BMW 118i, BMW 120i, BMW 316i, BMW 318i, BMW 320i, BMW 320si, and BMW X1 18i models. See vehicle applications link for details.
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 ShapeRound
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.79 oz (23 ml)
FlangesNone
Height4.5 in (114 mm)
Inner WireNo
Inside Diameter3.156 in (80 mm)
Outside Diameter5.125 in (130 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height7.13 in (181 mm)
Product Box Length7.06 in (179 mm)
Product Box Width7.06 in (179 mm)
Product StyleRound Air Filter
Top Material/FinishNone
Top StyleRubber
Weight1 lb (0.5 kg)

K&N E-2021 Air Filter Product Reviews

Monday, June 27, 2016 - Part E-2021
Definitely works, smoothed tick over and top end power gains, slightly more torque too. Arrived next day, cannot fault.

Revan Ramsden
Sheffield, United Kingdom
Tuesday, March 22, 2016 - Part E-2021
Excellent. Very fast delivery.

Geoffrey Hudson
Nottingham, United Kingdom