Ek fluid gaming
Ek fluid gaming
I haven't come across the SO kit before, but your title about fluid gaming with an aluminum kit means any aluminum radiator should work. Just avoid using copper or nickel in the loop. I'm not sure about brass... but I doubt it too.
others have asked if all the other EK pumps are compatible with the fluid gaming lineup. I’m having trouble finding details about whether other pumps have copper or brass internals. I own the pump that comes with the kit, but I’m not sure if upgrades are available or if I can use any pump I prefer.