88 80Q Intake boot?

[Dr. Cory Brayton]

I need a new intake boot for 88 80Q -- can't find part# or part

I had vacuum checked when emissions test --> HC > 200 &
'check engine' light flashed sporadically

Smoke test revealed leaks @ hoses/seals which were replaced.
the intake boot would not set/seal properly & they say I need a new one.

I think braking is improved since vacuum/hose/seal repair.
I'd thought that they had been soft/sluggish for quite a while --
Is this vacuum involved in 'power assist' for brakes?

Also sometimes when I start car rear differential is 'on' tho I did not turn
it on & it's difficult to turn off manually & its not ideal to accelerate
sufficiently for auto turn off 6 floors up in garage -- Any ideas?

I'm waiting for re from Audi connection wrt part

Thanks very much again

Cory B
88 80Q
Houston TX