This external MAP sensor adapter allows you to install a 2G/EVO OEM MAP sensor when using an aftermarket intake manifold that doesn't allow for an OEM sensor. The MAP sensor is bolted to the back side, a vacuum line is then ran from the hose barbed side and tee'd into a pressurized source on your current intake manifold. (Vacuum hose and "T" fitting NOT included). Adapter is light weight and can hang loosely or be tied up anywhere in the engine bay. CNC machined from 6061 aluminum. Included is a 1/4" NPT x 1/4" ID hose barb fitting.