I knew of this muffler for some time and was able to get it some time later. According to the LIMITED information being parts listing with it or production time I was able to find out it was made early in the 090G production. Basically after the Contra G and GS was evovled into the 090G and casted mufflers were still prevelant. With that it would have been a very short lived style and the last of the casted 1106 mufflers as all other 1106 mufflers for the 090G were stamped and furnace brazed tin.