"Illflem" is right!!!
My son just bought a 2001. 5 Dodge CTD 4X4 from
"Hendrick Dodge" in Cary, N. C. They sell "K&N" filters
for all of the Dodge Diesel trucks right in their parts
dept. showroom! I already run a K&N filter in my 96'
(I like it and have had NO PROBLEMS with it) and asked
the parts manager if I "bought a K&N for my son's truck
and installed it would it void the warranty?" His reply
was "No it won't!"
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John_P