-6 for supply and return is way more than adeqate, think of the size of that compared to the standard sized pipes , I installed a complete aeroquip system on my car with 044 pump around 2 years ago. The only thing I would do is get the teflon lined hose, I was told that non-teflon lined hose was ok if youre running it outside the car, but it still flipping stinks to high heaven if youre sitting stationary with the fan on inside the car. You shoukd need approximately 10m of hose I think so it's not cheap by the time you get all the fittings. I would try somewhere like Pitrek/Earls to get the fittings from.