Silencer for AM Vantage N420

[CATDT]

Looking for information on a good silencer for the above, that will allow the car to pass the Donington 98 db drive by limit.

Do you have any knowledge/experience of which is the best one that will ensure noise requirement is met? I'm assured by BookaTrack that there are options clients driving this variant have successfully used.

Grateful for all info and recommendations.

Thanks in advance.
Jo