Brian, Carter's catalog lists the Carter W1 for 40-48 with one part number, and one for the 49 only with a different part number. I ordered the one for the 49 and, according to the paperwork, received the one for the 40-48. Sooooooooooo, I really don't know what I have. Everything fits except the fuel line, which is too big, so I was thinking (silly me) that there was difference in the 48 and 49 somehow.
