Ford 401 Diesel Cylinder Repair Sleeves 4.4 Bore HD7NN6055A Posted onJuly 22, 2025CategoriesfordTagsbore, cylinder, diesel, ford, hd7nn6055a, repair, sleeves New sleeves that have been on my shelf forever. 9 long, 4.590 O. And 4.366 I. To be bored to 4.400.