The Ultimate High-Performance Heat Exchanger for the Mercedes Benz C63 AMG. Mercedes 4.0L V8 bi-turbo engine utilizes a charge air cooler system a water circuit (which flows through a pump into the charge coolers) and a heat exchanger (which uses the water to cool the compressed air). This All-Aluminum High-Performance Heat Exchanger is larger and cools the water more efficiently than the OEM plastic/aluminum unit thus helping deliver cooler and denser air through the charge air cooling system increasing power capabilities. In its recent testing, significant performance improvements consisting of up to a 68% reduction in IATs (intake air temperatures) and a 400% improvement in heat soak reduction when compared to stock. As with all of CSF high-performance products, the same degree of engineering that has gone into the effectiveness of each product has gone into other aspects of its quality from its hand-polished mirror finish to extensive testing and perfect drop-in fitment that the CSF name prides itself upon.