I bought this here on E-bay, Then I checked into K&Ns' warranty.They stood behind my old filter, so I don't need this 1.
It fit the kit I have on my 2001 Silverado.
When I bought it I was told--
"You are bidding on a used K&N Air Filter RF 1041. This air filter saw less than 500 miles before being removed, as you can tell by the original filter media and chrome still looking nice. When it was removed it was in perfect operating condition."
After looking at it I think its more like a thousand or so, but it is pretty clean.
The one side has some dented ribs, but not bad enough to reduce its function.