What is this Vacuum Connector?

[Erik]

Originally Posted by A26B

I would recommend putting 3 or 4 dozen in your spare parts stash, depending on how long you plan to own your 1990 ZR-1.

Just kidding of course! One should last you for the next 20~30 years I would imagine.

Ok. I'll take 3 dozen please. I'll change them monthly.

My thought was more around if it was used elsewhere in the engine too.

Anything else like this I should order too?