Slipstreams on short pit stops

[taalmod]

We played the other day and the following situation occurred:

1) Car A has the pit closest to the first corner and chooses to make a short pitstop. He succeeds and moves 4 spaces out onto the straight.
2) Car B has the pit right next to it, and amskes a short, successfull pit stop in the same round, and also moves 4 spaces out into the straight.
3) Car B is now placed directly behind car A.

Question:
Can Car B use slipstream on Car A in this situation?

We looked, but could not find any mention of it in the masters rules.

[Al1]

Yes its possible, as rule does say.
* when you succeed a short pitstop, you are in 4th gear (no choice)
* when you are in 4th gear behind another car in 4th gear, you can slipstream.

So if the rule doesn't say that it's impossible in this case, it's possible