Car vibrates when going fast ?

[MaXx0909]

I have an 07 yaris hatchback, all stock and just recently the car started shaking when going on the highway faster than around 150 km/h. I've had new tires put on rims, and noticed the little weights weren't there in the front right side and rear left side, also i've put a new axle in the passenger side. Yes I do live in Canada which means winters are pretty bad and i'm still driving with summer tires on but they started doing that a while before. it does vibrate a little bit going the speed limit which is 110kmh but nothing to bother me. I just like to go home quick after work and cruise at around 150 km/h's and no i don't need people telling me that i shouldn't do it, i just need help :) thanks