Preheat oven to 350°F.
In mixing bowl, mix 2-cups of cake mix, flour, yeast and water until well blended. Stir in eggs.
Transfer to a greased 9x13-inch baking dish. Gently spoon both cans of pie filling over batter.
In a small bowl, place remaining cake mix; cut in butter until crumbly and sprinkle over filling.
Bake at 350°F. for 40 to 50 minutes or until lightly browned. Cool on a wire rack.
Combine the confectioners' sugar, corn syrup and enough water to achieve desired consistency. Drizzle over warm coffee cake.