1998 AIR Quick question??

The AIR and EGR mount to the brackets (both have plates in this picture). The EGR bolts onto the head, which you can see on the right side of the picture. There is a hose that goes into the top of the intake, right behind the throttle body. If you replaced the LS1 intake, it's quite possible that you don't have a hole for the EGR.
The hose that people plug with a screw is probably the coolant line to the throttle body. You can see it in this picture. It's the thin tube just to the lower right of the TB.




