Car Sits Lower at back than front

[zegoat]

Morning all,

I recently bought a 370z which had einbach springs and spacers on, so looked bad *** but also had its *** to low to the ground which meant it kept hitting speed bumps all sorts (im in the UK).

The guy I got the car front gave me the original springs so I had these switched on, but the only thing is now the car sits lower at the back than it does at the front, almost as if its leaning back - I hate it . Car drives ok, no handling problems/noises just looks deformed.

Any reasons why this could be?