Hi Paul and All: As far as I can determine, all 300Fs had the little plenum under the louvers. I know all my 300Fs do, and it looks to me like Steve's does as well. The plenum was attached by a heat curing structural adhesive. (Spotwelds couldn't be used for appearance reasons.) This adhesive sometimes didn't bond as well as was intended. The "F" I am currently working on is bonded for only about 1/2 of the length it should be. At the rear it is retained by the hood reinforcement, so even with the substandard adhesion, it seems pretty secure. I am sure others were even less well adheared, and in time fell off. If such was the case, it would likely be lost on the road somewhere. A search of the parts book turned up no part number for this item, so I guess you will have to try and find a parts 300F hood. Hope this is of some help. 300ly, Gil Cunningham In a message dated 1/30/2006 7:32:38 PM Eastern Standard Time, paul_martin78ca@xxxxxxxx writes: While looking at Henry Hopkins 300F at BJ last week I noticed a plate attached to the underside of the hood covering the louvers. My car does not have this. Steve Albu's car does not appear to have this. I have looked at several engine bay photos on the site and see this plate on some 300F's(Mona Steinbergs,Dan Reitz) but not all. Anybody know if this was an Early Production,vs late production thing. Paul Martin [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/