Angela Guisci Dec 9, 2015:

@ I don't really know. I found it on iate.....

James (Jim) Davis Dec 9, 2015:

More context please A "supporto motore" is an "engine mount" (like a thick rubber sandwich where the bread is sheet metal) which sits between a structural member (part of the chassis) and the engine. Without them a car would become a true and genuine boneshaker. The use of the word staffe makes me thing of "plates" probably welded onto the chassis which engine mounts (for the engine) and the gearbox and diff would be fitted to.