Hooker headers extra tube bit?

[Ballaratcastle]

Sorry for the dumb arse question but I purchased some 351W Hooker headers for my car and have just unboxed them to put exhaust wrap on them before installing when I noticed an extra tube bit on one of the headers. Not sure what it is for. My old rusty headers that came loose with the car parts did not have this extra bit. (Shown on the right hand side bottom) 

 

sulfate uses

 

[NOT A T5]

It's a "Stove" for an air cleaner or carburetor hook up but most people I know don't use it. I would think twice about wrapping headers since doing so can trap moisture  and they can rust through. Getting them ceramic coated is what I would do.

 

[Ballaratcastle]

Thanks. I showed my Mechanic last night who also didn't recommend wrapping. They have the black heat coating on them which will have to do then as budget blown and can't afford the coating here in NZ. Cheers