Competition Package Wagner Tuning for BMW F-series B58 Engine without OPF (catless) - WT-700001069. CATLESS - The Competition Package for the BMW F-series B58 engine consists the Radiator Upgrade Kit, the Downpipe Kit and fits the following vehicles. BMW 1er F20/F21 LCI from 09/2015 - M140(x)i BMW 2er F22/F23 LCI from 09/2016 - M240i BMW 3er F30/F31/F34/F35 LCI from 09/2014 - 340i BMW 4er F32/F33/F36 LCI from 05/2016 - 440i Radiator Upgrade Kit 400001002 The 3.0 Liter B58 turbo engine of the specified BMW models is equipped with an indirect charge-air cooling circuit. So the cooling of the charged air is not realized by the ambient air as cooling medium (as usual), but made with its own cooling water circuit. A reduction of the temperature of the cooling water is directly equated with an improved cooling performance of the charged air. This is exactly where the advantages of the WAGNERTUNING upgrade radiator comes into play. The new developed competition racing core of the WAGNERTUNING high performance radiator increase the radiator volume of the OEM water cooler by a total of 117 %. The calculated ratio between the inner and outer cooling surface generates a maximum heat transfer and allows at the same time enough air flow for the surrounding components (for example the engine radiator) for its own heat exchange. Furthermore, using an increased amount of cooling water, the entire system thermics can be kept at a lower level over a longer period of time. All WAGNERTUNING radiators are equipped with a heat-conductive anti corrosion coating to ensure a lasting cooling effect. The plug & play installation of the system is simple and easy to perform (an installation instruction is included as well). Downpipe-Kit B58 500001027 made out of high quality stainless steel 1.4301 (SS304)complete Ø3,5 and adapter for stock exhaustoptionally without catalyst converter / 200CPSI EU6 high quality racing metal catalytist converter 100% perfect fit, replace OE Mless thermal load on the turbochargermore power by reducing back pressuresignificantly more torque