Spencer: no its all 1", i cant imagine needing that much vent line. knowing where the front vent thru hull is, and those legs are so long on the arm, i cant imagin needing more than 5-6 of vent. but i couild be wrong. and the boat is only 21'-6" so i wouldnt think i would need 25 feet, but again if gas tanks etc get in the way it will each up running feet fast if i have to go around objects. the cheaper price listed above will make it easier to buy some extra.