The EU directive that brought you the tyre noise regulations looks like it has a whole load more in tow.
The document that contains the details on tyre noise regulations also has these clauses in it’s summary of proposed action
Further to our update on BIVA Consultation where we spotted that the EU were looking into restriction on chip tuning: –
”We will keep the situation under review during the implementation period and maintain contacts with stakeholders to identify any new or emerging evidence. The European Commission also plan to regulate certain items fitted in the aftermarket (such as engine management “chips”) and we will await their proposals.“