Little Help with Emissions....

[Z34LS1]

Greetings all, if you've followed my Build thread on my Z57 your familar with my car. I have a problem. Local Junk Yards don't have any Late Model F Body parts and I need a piece I did not get with the Car.
On my 98 LS1 there are two Rubber hoses, both go to the Exhaust Manifolds. The two come together at the Back of the Intake then there is a single Rubber Hose that comes up over the Drivers Front Inner heel Housing. I am missing whatever that Rubber Hose plugs into.
Can Someone here Please post a Picture of what I'm missing? And Please tell me What it is? The Engine runs with it unplugged but I get a Nasty pop out the Exhaust. When I plug it up it Sounds Great with no popping.
Thanks Everyone for any Help.

Joe

[slims00ls1z28]

Plug it it is the AIR system. No need for it. It might throw a code but thats all. Goes all the way to the front of the car to a pump under the driver side headlight.

[Z34LS1]

Hmmm...I did not get the Headlights with the Car, they were removed. I appreciate the Reply. Can Anyone tell me what it was supposed to do?