Replaces the Hydro-Boost kit for your Demco Air Force One supplemental braking system (9599007, 9599019, 9599020, or 9599021). Kit includes (1) 5.8" Acorn nut, 1 rubber plug, and (1) 0.375" barbed plug.
Very easy process, good prices and my products were shipped on time and were delivered on time. The instructional videos online helped make installation easy!
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