The competition package for the BMW F-serie consists of the intercooler upgrade kit, the N20 downpipe kit with 200 CPI racing catalyst. Intercooler Upgrade Kit 200001071 The high-performance intercooler has the following dimensions (520mm x215mm x145mm /stepped 13.840cm³ / Stock IC 510mm x130mm x110mm, 7.293cm³) Approx. 85% bigger surface and 90% more volume over Stock Intercooler. The competition core provides excellent cooling properties and weight is also very low (8,6kg). The end tanks of the intercooler are made of cast aluminum and have been optimized with the help of flow analysis in the CAD system. Plug & Play Installation using the stock plumming, no cutting or bumper removal required. Packing List: 1 Intercooler 1 Mounting material 1 Installation instruction The Downpipe-Kit for the BMW N20 engine 500001011 direct replacement for OEM BMW Part# 18327645666 made out of 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 200cpi Catalytic Converter connection diameter 105mm