Aluminium MAP Sensor Flange Adapter - VAG 1.8T / TDI Alumium CNC machined One flange for both sizes of sensors This flange is needed to install the original MAP / boost sensor of the 1.8T cars into an aluminium boost piping. The flange is rounded at the back side to get welded easily at a pipe. It is perfect for pipes from 50 to 80mm diameter. The flanges comes with 2 Adapters to be able to mount both versions of MAP sensors. The Adapter is CNC mashined of 6061 aluminium. Bolt distance: 37mm Inner diameter adapter rings: 18mm & 12mm Height: 19mm Lenght: 43mm