you've also got to watch if lowering it too much (more than 20mm) that your egine mounts are in tip top shape - as the more yuo lower the more you increase the angle of the driveshafts from the front dif to the hubs and they can easilly pop out when you accellerate if the engine mounts are getting a bot long in the tooth, swap them for a new set of ford ones for comfort - at a set of vibratech ones for fit and forget but they do introduce a bit of vibration into the cabin.