Yes your M3 redlines at 7900rpm but is producing 343hp. The Speed limitor is the same as for EU. All new high performane cars sold in Europe such as BMW, Mercedes, Audi have limited top speed to 250kmh - 155mph.
Your manual says 333hp because has been converted to US spec. but thats what Im trying to explain here.
When the M3 makes 343hp in Europe, Asia, Australia, Africa, Middle East, why it would make 333 in USA???