OK, I was almost right...
EGR venturi vacuum amplifier
A device that uses a relatively weak venturi vacuum to control a manifold vacuum signal to operate the EGR valve. Contains a check valve and relief valve that open whenever the venturi vacuum signal is equal to or greater than manifold vacuum
tailpipe it yet? Like smog check? No im trying to get everything ship shape to smog it as I kinda told myself if it dont pass smog, its out a here. scrapper or part out.
