If you get enough lift to reduce the weight of the car it will reduce your traction. if you have traction control it will drive that crazy, also you may find yourself drifting of across the autoroute into the crash barrier as you lose traction, now this will endear you to all the french drivers around, A Rosbif joining in their national sport of barrier bending avec un voiture, but will go down like a lead balloon with your wife and family, who you ,may find actually matter more to you than you think at this point.also if you have imbibed too many of the aforementioned John Smiths monsieur le Gendarme will take your licence and throw it into the nearest river never to be seen again and ask for lots of money to fund the next Gendarme summer barbecue back at the hotel de police, and their drink drive limit is lower than ours believe it or not,