I want to get a 200cell katalytic converter. Does anyone know what are the inlet and outlet dimensions of the OEM katalyste. Also what are the overall dimensions of the OEM katalyst? I have found a couple of 200cell katalytic converters which are not the same. The first one has 320mm length, 150mm width, 100mm height and 55mm inlet and outlet diameters. The other one has 270mm length, 130mm width, 120mm height and 50-65mm inlet and outlet diameters. Do I also need a flexi exhaust pipe?