So, today I installed the 20V brake (2.3 NG) with me. It all fits great right away. A 20V brake booster is not necessary. The pedal path is exactly the same as before. However, I had to buy longer brake hoses today because the originals were too short. The 20V are however as long as the NG. Probably the connection to the brake line is lower at the 20V. Have some of the A4 installed. Here are the old ones…