Although this engine already marked the third development stage, the roots of the VW Beetle engine were still clearly visible.The carburetor system had been changed. The long and heated induction pipe disappeared. The carburetors were arranged immediately above the cylinder heads. This lead to a more spontaneous appealing to the accelerator pedal movements and more achievement. Of course, the electrical arrangement with the direct current generator in the center of the picture, and the cooling with the large radial blower did not alter much. However, the place of the carburetor had been exchanged for the big partial-flow oil filter to the left of the generator. The VW Beetle had to make do with only 2.5 liters of lubricating oil in the circulation, which was filtered by a rather coarse sieve.