> "10cm at the lowest point of the car,"

This doesn't include exhaust, only chassis.


Also, springs need to be captive.


Trism> and all it it says is that the maximum you can lower a car is 1/3 of the original height...

I think it is possible to interpret that as being as retaining at least 2/3 of OEM suspension travel.

Smaller tyres, shortened shocks and/or Dropped spindles allow for lowered stance with full suspension travel.

I guess its all up to the engineer.

Nick.