Boardgamegeek https://boardgamegeek.com/boardgameexpansion/25946/pitchcar-extension-2-more-speed-more-fun
English - Expansion pack for PitchCar only. This is not compatible with Carabande.
Ludovox http://ludovox.fr/jeu-de-societe/pitchcar-extension-n2-182/
French - Un jeu de Jean du Poël.