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Verification Extension to the Donaldson LNF System for On-road
Applications. 

The Air Resources Board has extended the verification of the
Donaldson Low NO2 (LNF) Muffler System to select 1993 through
2006 model year diesel engines used in on-road applications.  All
of these engines are four-stroke, turbocharged, and have
certified oxides of nitrogen (NOx) emissions of 3.0 grams per
brake horsepower-hour (g/bhp-hr) or higher, as well as were
certified in California to the 0.1 g/bhp-hr particulate matter
(PM) emission standard when new.  The LNF System employs a
catalyzed pre-filter and a catalyzed diesel particulate filter
with a back pressure monitor 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 LNF System has been approved may be found in the Executive
Order found in the Executive Order which will be posted within
ten days on the ARB website at:
http://www.arb.ca.gov/diesel/verdev/verdev.htm . 


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