CSF 2015+ Mercedes Benz C63 AMG (W205) Auxiliary Radiator- Some Applications Require Qty 2The High Performance All Aluminum Auxiliary Radiators work in conjunction with the rest of the cooling system to reduce temperatures throughout. This is critical as the Auxiliary Radiators not only help keep engine water temperatures lower, but also are utilized as the heat exchange medium in the air to water charge air coolers for the turbocharger system to reduce intake air temperatures (IATs). Overall, the Auxiliary Radiators larger capacity