Please excuse my terrible quick demonstration made in paint.
The pink outlined piece (the block, tubing, and radiator) are all connected and are one piece. The fan (red) comes in the box but it isn't attached to the radiator yet. It comes just like the Noctua fans.
When you install the H55 unit to the back of your case you simply use the Noctua fans you paid for instead of the Corsair fan that comes free packaged with the H55 cooling unit.
Edit for better demonstration.
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