I've hit 165-167mph multiple times on the Autobahn when driving to the Nurburgring, and the Zed feels completely fine. if anything maybe a little bit light at the front end, but that's to be expected. Besides, it's not like you're going to be anywhere near those speeds anywhere else other than the de-restricted German Autobahn. At normal, regulated motorway speeds you should be having absolutely zero issues whatsoever!