How exactly do You want to reduce the weight of current WRC cars by 100 kg when You can't/don't want to produce completely new bodyshell panels from different materials, new light-weight suspension etc. (also bear in mind that even such radical changes require change of regulations)?
Agree, I miss those times when there were many seats available in manufacturer cars and then besides them many privateers who actually show some promising times.
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WRC mainclass from 2027