V65 Sabre's actual top speed is 154 tested, so about the same as a VMax. Design speed is an entirely different can of worms. The ZX11 proved what it took to actually top 170.
Nowhere near as good as a full Kerker, though. I still have the Supertrapps on mine but have a Kerker 4-1 that will be going on soon. My friend's VMax has a Kerker and it is righteous.