We would go to a maximum drop of 35mm on most models. You risk rubbing on the arches if you go lower than this. Top end power should be your overall aim on the 407 with a nice fat peak torque band. 407 make good sleepers if you debadge them and fit the most powerful engine upgrades and handling mods you can source! eHpbOa.

peugeot 407 1.6 hdi chip tuning