Has vacuum line into it from the main hard line off the motor that also tees off to the brake booster then the other side goes to the injector pump, maybe controlling the idle for the engine?
Has a couple of different numbers on it> K5T4 7579 5Y13 and on the other side K5T4 7590 5Y14



just wondering what its called as I have get a new one as somehow in the engine swap I just did, one of the ports got snapped off.
