lowering springs

[paz46]

hi when i got my g40 it was already lowered but i want my back lower i want it to look like the front looks here's a pic ov it as it sits now if sum1 could recomend what mm springs i would need for rear to get the look im after thanks

[SuperMario]

id say 60mm, whats the front at?

[paz46]

iv know idea what front is forgot to ask when i got car lol