“Is this related to F1 kers?”
I would think more likely for VW Group, to develop towards Le Mans, since they do not race in F1 now or in the recent past.
For Le Mans, they have been using advanced technology to win, including Diesel, Hybrids, etc.
For the 24 Hours of Le Mans, fuel economy matters, since they can eliminate refueling pit stops, as an example. They did that a few years back with diesel.
Hope it does not make it to F1, they’ve screwed around with the sound enough. Back in the late 70s I got to stand about 4 paces behind a F1 Ferrari in the paddock area at Watkins Glen. One of the mechanics was revving it up to tune it. They were running 3.0 liter 12 cylinder engines back then (flat 12s). Lost a little hearing I’m sure, but it was worth it, the sound was glorious.