ALLOY WATER TO AIR INTERCOOLER 220x200x110mm (2.5" Inlet/Outlet)Alloy high flow Water To Air Intercooler Water to Air Intercooler setup is similar in principle to a traditional air to air setup, except that there is water passing through the core of the intercooler instead of air which is responsible for drawing the heat out of the intake air. There are many benefits of using a water to air intercooler setup. Overall size: 375mm x 278mm x 115mm Core size: 220x200x110 mm (End tanks add to length) 2. 5" inlet and 2.