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6600k TDP is 91W standard. That kit will be fine at cooling this to a good delta level.
As above, depending on the extremity of your overclock, you MAY need additional/better cooling.
Give it a go though and just keep an eye on your temperatures.
Let us know how you get on.
For some inspiration going forward, here is a picture found with a quick google. I'm guessing this has 2 360mm radiators in there(the one in your kit is 240mm) so you've got plenty of room for expanding down the line without changing case