399 kit is just the hanger alone. You will need to get the pumps, lines, fittings, venturi block. I bought the full kit last year. I didnt get directions with the kit, just a few boxes of parts. Its pretty easy to figure out whats what, and they did answer any questions I had over the phone. Its a nice kit to be honest, and it should be for the money it cost.
Lonnies twin pump kit