June 3, 2011 at 1:32 AM #1 Already rebuilt by damper doctor 4L date code. Not used after rebuild. Trade for a 5F-5H date code or make me an offer. I am not sure what these are worth.http://cid-2ffe9000db6dc074.photos.live.com/self.aspx/Must…ts/DSCN2537.JPG