Chris, as Fabio has said, those hoses under the intake
manifold are one of the common failure points in the 550's cooling system.
The hoses you have purchased are made by/for Scuderia Rampante Innovations (SRI), a company owned & run by a Ferrari expert, and specialising in developing products of the highest quality to eliminate well known problems in these cars.
So you made a good choice, but be sure to change all the coolant hoses in the system, even the smallest ones that serve to deaerate the system.
I've made similar cooling system modifications as yours, only with the stock pump (I changed the impeller to the later 575/612 version, and also used the smaller pulley) In my case however, these modifications didn't help my cooling system problem, which was overheating at idle in traffic.
Just FYI, the modification that finally sorted my overheating issue was switching from a 50/50 antifreeze/water mix to a nearly 100% pure water setup, with the necessary anti-corrosion additive package. The pure water setup has the ability to remove 25-30% more heat from the engine than the antifreeze mix, so it has restored some of the lost efficiency in the system. My current plans to address the longterm underperformance of this system include installing a higher capacity radiator and more powerful fans. Hopefully these mods will allow me to return to an antifreeze/water mix, which will give the system the needed freeze protection, which the pure water setup does not.