The performance package for the BMW E-series consists of the intercooler upgrade kit EVO1 and the N55 downpipe kit without catalyst and fits the following vehicles. BMW 135i E82/E88 BMW 335(x)i E90/E91/E92/E93 Intercooler Upgrade Kit 200001023 This Performance intercooler has the following core size (520mm x 210mm x 130mm / stepped = 11.752 cm³ ), providing a 85% larger frontalarea and 60% more volume compared to the original intercooler. Our engineers have increased the intercooler core size and efficiency, as well as improved the end tank design to remove any OEM bottlenecks, resulting in increased flow rating and charge cooling properties. High-performance Intercooler core with turbulators in a stepped design (weight: 9kg). Constructed of the highest quality Bar and Plate intercooler cores combined with cast aluminum optimized by CAD. Flow analyses and simulations were created to optimise the design for best possible Internal Airflow. This intercooler is the best choice when it comes to performance gains and low intake temperatures. A lot less pressure drop then OEM Intercooler. Anti Corrosion protective Coating with perfect thermal heat dissapating character. Optimal cooling with clearly more power. Kit is ready for installation (plug & play), using the stock plumming. No cutting or bumper removal required. Fitment is easy, replacing the OEM intercooler. All of our products undergo rigorous quality control. Kit comes with: Intercooler black Mounting material Installation Instruction The N55 downpipe kit catless made with high quality stainless steel 1.4301 (SS304) 100% perfect fit, replace OEM less thermal load on the turbocharger more power by reducing back pressure significantly more torque without Catalytic Converter