California Air Resources Board

Note: Verifications are issued chronologically. The most recently issued Executive Order or individual attachment is the one which is currently in effect and is listed below each manufacturer’s verification. The most recent Executive Order supersedes any previous Executive Orders for the same product. Should you wish to view any previous Executive Orders or attachments for reference purposes related to a manufacturer’s verification, please view the associated link below each description.

CARB has verified the HUSS, Incorporated FS-MK filter as a Level 3 Plus diesel emission control system for use with certain on-road diesel engines rated to at most 810 horsepower. The FS-MK series of filters uses a silicon carbide wall-flow filter with a fuel burner for regeneration to achieve an 85 percent reduction in particulate matter emissions. In addition, the HUSS FS-MK filter may be used with diesel fuel that contains as much as 20 percent biodiesel. Specific conditions for which the FS-MK has been approved may be found in the Executive Orders.  HUSS has an approved re-designation policy but does not allow filter swapping.

Superseded Executive Orders