Are you referring to Stebro? As far as I know, they have nothing to do with Ferrari other than that they make after-market exhaust systems which a number of Italian car enthusiasts use.
My experience with them has been a bit spotty on the service side and have had fit issues. Maybe they are better capitalized now and able to do more for their customers. The products have a very strong reputation for build quality and every one I have heard sounded very good.
If it is infact Stebro you are talking about, here's the url,