Overheating issues with remanufactured 360

i see this a lot.Like RRR mentioned,how can any air get through that flat aluminum and what is the rating of those fans?

Don't remember the exact rating but they were the highest rated for their size. We have them set to where they come on when we turn the key.

We have changed the water pump.

As I said we had problems before we had the shroud and fans.