In a large bowl, combine the sugar, oil, eggs and extract. Combine the flour, baking powder, baking soda and salt; add to sugar mixture alternately with buttermilk, stirring just until moistened. Fold in coconut and walnuts.
Pour into two greased 8x4-in. loaf pans. Bake at 325° for 60-65 minutes or until toothpick inserted in the center comes out clean. Cool 10 minutes in pans before removing from pans to wire racks to cool completely.
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