The Forge PolarCooler Chargecooler is specifically designed top-mount replacement chargecooler and expansion tank system to enhance your vehicles auxiliary cooling system and help overcome the performance loss and efficiency issues associated with higher temperatures, created from aftermarket ECU tuning and high-performance demands on your engine.All Aluminium construction overcomes common plastic part failure points.Quadruple water pass cooling system.Coolant filler cap and sight glass for easy maintenance.Durable black powder-coated finishNo cutting or trimming required to fit this productA Charge Cooler works on a very similar basis to an uprated intercooler but uses water instead of air to provide additional cooling a key component to this system is the charge cooler. The PolarCooler upgrade charge cooler core size is increased over the OE system which speeds up heat transfer and increases cooling characteristics which should, in turn, lead to lower overall operating temperatures a