You wont even get that close to the ground with lowering springs... maybe with adjusties..
+1, your strut towers are too long to still be effective, you'd be basically running on the bump stops, your struts would shag themselves....
40mm is 4cm... stack a few mates into the back of your car as an indicator.
look for progressive rate springs if your budget allows...
Oh right, so if I chuck in the 40mm lowering springs my car would be fine?
What does progressive rate springs do?
Sorry to be so annoying!