"Coolant Reservoir/Icebox for your 2009-2015 CTS-V supercharger heat exchanger coolant
Made of .125 tig welded aluminum with BMR custom flush mounted lid
Predrilled for mounting holes - Silicone O ring that won't degrade over time
Black Market Racing's reservoir is designed with the return line through the bottom of the reservoir with the outlet via a drilled tube to allow for filtration of ice and to prevent blockage of flow. Other brands have one hole exiting the box that will get blocked one ice cube at a time. By having a larger surface area to get water from and being cylindrical, this box is impossible to be flow restricted, making it the best on the market. By bringing the hot water in through the bottom it is forced to mix with the cooler water on the bottom of the reservoir. Then the coldest water goes straight to the bottom of the lid for maximum cooling."