Any Bugatti is infinitely customizable and the automaker will place one-carat diamonds in the speedometer if a client so wishes. This is in addition to the existing diamonds that are already used in a Bugatti but are hidden away. A Bugatti Chiron has an Accuton audio system that uses a one-carat diamond as a membrane for each of its four audio tweeters. Bugatti says that this provides optimal aural fidelity.