I have a theory on why the Shaker Hood went out of production, but I have no proof, just a theory. Why did only the Shaker Hood go out of production and not the Rallye Hood and the Flat Hood, this backs up part of my theory on why the Shaker Hood went out of production for a while. Also I have serial numbers of five Challengers that received a Shaker Hood in the times that the Shaker Hoods were not put on Challengers. This was in Dec. and in Feb. When I wrote this information down I never even knew that the Shaker Hoods went out of production.