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Verification of the Donaldson LNF System for On-road
Applications. 

The Air Resources Board has verified the Donaldson Low NO2 (LNF)
Muffler System for select 1993 through 2003 model year diesel
engines used in on-road applications.  All of these engines are
four-stroke, turbocharged, and were certified in California to
the 0.1 grams per brake horsepower-hour (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 and attachment which will be available within 10 days on
our webpage: http://www.arb.ca.gov/diesel/verdev/verdev.htm

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