SU-122V (USSR, Tier-8, TD, premium mechanics: hydropneumatic suspension activated by a button) + SU-122V was transferred from tier 9 to tier 8
Historical reference:
The SU-122V is one of the preliminary designs of the mid-50s, which is a tank destroyer that can be aimed horizontally by turning the hull. A hydropneumatic suspension was developed for the vehicle with the ability to tilt the body forward or backward, which further increased the elevation and declination angles of the gun. The engine-transmission group was located in the front of the self-propelled gun. The gun was not rigidly fixed; guidance was carried out in two planes, but the horizontal guidance sector was limited. Work on the car stopped at the sketch stage. 
No change to stats? Lol. What are they doing?
The historical part left a very long time ago and said it wasn’t coming back. This game is now a fantasy tale.