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ARB extended the verification of Engine Control Systems’
Combifilter diesel particulate filter to include model years
2005 to 2007 diesel engines used in off-road applications
operating on ultra low sulfur diesel fuel or bio-diesel (B20).
The Combifilter system employs an actively regenerated
uncatalyzed diesel particulate filter to achieve an 85 percent
reduction in particulate matter emissions, qualifying it for
Level 3 Plus verification. Specific engine families and
conditions for which the Combifilter has been approved may be
found in the Executive Order posted on our website at: 
http://www.arb.ca.gov/diesel/verdev/level3/level3.htm.


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