List Price: $72.59
You Save $14.60 (20.1%)
$57.99 USD
Part:   21-203BF-OS

AEM 21-203BF-OS DryFlow Air Filter

Universal Air Filters AEM DryFlow Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0
  • Excellent filtration with great air flow
  • Does not require oil
  • Easy to clean
  • Synthetic filter media

AEM Brute Force Dryflow Air Filters are specially designed for tough off-road applications. They provide outstanding levels of filtration efficiency and capacity. AEM Brute Force Air Filters are oil-free and their synthetic media is incredibly easy to clean. Even more impressive, they are so durable that they maintain their shape under even severe abuse.
Specifications AEM 21-203BF-OS Product Specifications
Air Filter MaterialNon-woven Synthetic
Air Filter ShapeTapered Conical
Base Outside Diameter5.5 in (140 mm)
Flange TypeOffset
Flange Length0.938 in (24 mm)
Flange Inside Diameter3 in (76 mm)
Flange Offset0.438 in (11 mm)
Height5 in (127 mm)
Package Contents1 Air Filter
Package Quantity1
Top MaterialNone
Top Outside Diameter4.75 in (121 mm)
Top StyleRubber
Product StyleAEM Dryflow Round Tapered Air Filter
Filter MaterialNon-woven Synthetic
Air Filter ColorGray
Weight1.1 lb (0.5 kg)
Air Filter Large End Diameter5.5 in (140 mm)
Product Box Height7.13 in (181 mm)
Product Box Length6.38 in (162 mm)
Product Box Width6.38 in (162 mm)
Inner Structural SupportNo
WarrantyLimited Lifetime
WARNING: Cancer and reproductive
Reviews Product Reviews

Jackie K Guillermo from Makawao, Hawaii
August 3, 2016 - Part 21-203BF-OS
I have found this online site the very best in navigation, product & shipping cost. I have both standard & offset flanged Brute Force Dryflow Air Filters. Maintenance wise have not led to extra expenditures to clean & upkeep these filters. The standard filters have served me well on various Toyota 4 & V6 engines where I have dispensed with the stock airbox & panel air filters. The OS is used on my daughters 2014 KIA Optima LX, 2.4l which has an aftermarket cai locating the Dryflow Air Filter close to the backside of the drivers side fog light. This may be an unusual fitment since the car is South Korean built or the car model & optional fog light housing. This one has the single outside lens.
Jackie K Guillermo from Upcountry, Hawaii
July 14, 2016 - Part 21-203BF-OS
I have been using the AEM Universal Tapered Cone Grey Media Filters for over 10 years, long before it was designated BF. My inventory consists mostly of the AEM 21-203BF Air Filters both standard and offset flanged. These serve me well on Toyota 4/6 cylinder and KIA 2.4l engines. After cleaning and maintenance on the filters, they are shelved and used on a rotational basis. The filters don't have the wire screen on the outside which other filters have, that in my opinion, is a bother. Especially if the screen breaks and damages the media or unseen and poke one's fingers/hand. No oil mess, ease of maintenance and except for increase in price the BEST ALL AROUND FILTER FOR MY USE.
Steve from Colorado
May 31, 2016 - Part 21-203BF-OS
Great fit.