The AWE Tuning B5 S4 side mount intercooler kit is a great choice if you're looking for a stealthy intercooler solution that delivers big results. This system does not require cutting or modification to your stock bumper or belly pan. The intercooler design uses a closely stacked bar and plate type core. This minimizes power robbing pressure drop while maximizing heat transfer. AWE's design exceeds the cooling and flow capabilities of the factory Audi RS4 intercoolers, backed up by detailed test results proving the design's superiority. The construction of the AWE Tuning intercoolers is of the highest quality. Cast endtanks are used to ensure maximum flow and efficiency. Every intercooler assembly is pressure tested and leak checked before it leaves the AWE facility. Composite shrouds ensure a factory like fit and increase air flow over the cores for even better performance. This kit will also fit the Audi A6 and Allroad with 2.7T motor. Some modification to the bumper may be needed. Each kit comes complete with two intercoolers, AWE Tuning air ducts, special bracketry, and a detailed installation manual. No specialty tools are required for install.