I have done a boost/vacuum leak test and can hear the air from the RMS area. I have done a smoke machine and the smoke comes out of the RMS area, lower than the EGR and not visible from the top of the engine, only from the bottom. My other thought is the plenum gasket may be leaking from the rear, but the leak sounds lower and right at the RMS. All hoses are new and verified to not be leaking such as vacuum hoses/PCV and so on.