K&N parts matching BMC 21901 air filter

The BMC 21901 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many BMC air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
John Senter, New Braunfels, Texas
I have used this air filter on my 1995 Lexus SC400 without any ill effects (this is in response to the other review). I use K&N filters on all three of my vehicles and have noticed some fuel economy improvement. I have never done any performance testing. K&N air filters will pay for themselves in the long run and keep throwaway air filters out of our landfills. These are good products and I have used K&N filters for over a decade.
Peter, London, United Kingdom
Made a considerable difference when moved from standard filer to KN panel filter. Was quite shocked how much more it gives and sounds from stock blow off are now pretty loud - BPU Supra does not require induction kit it is a waste of money - drop in panel filter is a the best option. Had it on many of my previous cars always happy.
Justin Lee, Berkeley, California
Throttle seems to be more responsive and the install is like an OEM paper filter. Just keep your re-oiling to a light spray and I don't foresee any issues with the MAF sensors. This is just one part of a revival of my 97 4runner. Engine clean, new sparks and cables plus fuel filter cleaning.
33-2054 K&N 33-2054 Replacement Air Filter
List Price: $112.79
Your Price: $72.99