Lower too far and roll center geometry is compromised. Then, front end grip suffers and your Corrado G60, Mk2, or Mk3 (w/4x100 wheels) understeers. FIX IT with this drop pin ball joint kit (Spindle/hub assembly not included). Tie-rod mounting points are to be lowered by the same amount to eliminate bumpsteer. Lead time is usually about 2 weeks.
Base plate is coated in zinc chromate for durability.
Pins welded to customer-supplied knuckles for a safe permanent installation:
Fully built ball joint/spindle/hub assembly: