K&N parts matching BMC 43901 air filter

The BMC 43901 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
Peter K H Fong, Ninole, Hawaii
Service is great shipped very fast, and I found it cheaper to buy directly from K&N. The air filter fit was perfect,and I believe it was engineered better with it's much larger surface area,better for the engine to breath less restriction on intake. I will use other K&N filters, and highly recommend them Thank You K&N
Scott Baxter, St. Louis, Missouri
The product functioned as specified in every respect. We are talking about an air filter here, so there's not much to say regarding mechanics, etc. There is no 'seat of the pants' discernable performance improvement, only a properly functioning, well fitting air filter that can be cleaned and re-used. For what it is, it serves its purpose admirably.
Andy Bray, North East, England
Since fitting K&N, bike has had a 1200 mile run around Scotland and bike has never ran as good. Fuel consumption has dropped by a couple of miles per gallon and feels a lot fitter thanks K&N!
BM-1205 K&N BM-1205 Replacement Air Filter
List Price: $88.79
Your Price: $65.99