AMSOIL has announced changes to its bypass filtration product line, including several kits that have been discontinued. For diesel truck owners considering a bypass filtration system, this is a good time to check whether the kit they need is still available.
Which AMSOIL Bypass Filter Kits Are Being Discontinued?
AMSOIL has confirmed that the following bypass filtration kits are no longer available:
BMK21
BMK22
BMK30
Two additional kits, BMK26 and BMK31, are being discontinued while supplies last. Remaining inventory may still be available, so check current availability before ordering.
If you’ve been considering one of these systems, check its current status before making plans. A product listing remaining online doesn’t necessarily guarantee availability, and the correct kit must still match your vehicle and application.
BMK23 availability: Although included in the announced product changes, the BMK23 Universal Dual-Remote Bypass System was still listed for ordering on the AMSOIL website when this article was prepared.
What About the Other Bypass Filter Kits?
AMSOIL has also announced changes involving other existing kits, with further information about redesigned systems still to come. We’ll cover those changes separately when AMSOIL releases more details about the updated products.
For background on how bypass filtration works, see our Oil Filtration History and Fundamentals article.






