Coil overs are adjustable for height. There is a bracket that has to be mounted in front. All kits come with it. Ridetech, QA 1, Viking and more all have front coil over kits for 2003-2011 crown vics. It's a popular front swap for early Ford trucks. ADTR.net has Ridetech kits for stock height or lowered. Most kits will lower some from factory height