It holds coolant!
Yes, it does that, of course. Quality seems great but as this is my first one I cannot comment on how long it will/may last. Being all aluminum vs the stock piece which is plastic on top and bottom, I can only assume it’ll last longer. I went through 2 stock radiators, they each lasted about 5-6 years before the plastic would crack. For those curious, I was completely empty upon the install and this took 2.3 gallons to fill. Please enjoy the photo of my blown, stock radiator!