New item 4/15/17! Onan air intake tube for BF, B43M and B48M engines used on '85 and earlier 226, 446, 448 and 648 tractors. Not correct for the '86-'88 models that are equipped with the Nikki carburetor. Replaces J I CASE/Ingersoll p/n C20387. Sorry, this item is no longer available.