Joost:
I recon this is some sort of testbed, right?
Does a Singer equipped with this engine need additional air inlets like this in the rear fenders?
Yes, it will be integrated through the rear windows, fabulous stuff.
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1992 Mercedes-Benz W124 500E / 2003 BMW M3 CSL (sold) / 2008 Porsche 911 GT3 RS (sold) / 2014 BMW-Alpina D3 biturbo Touring / 2014 BMW-Alpina B3 biturbo Touring Allrad / 2018 Porsche 911 GT3 Clubsport