H&R Ultra Low Coil Overs are for the over-the-top enthusiasts who want extreme lowering. We suggest they be installed only by tuners who are familiar with the dynamics of ultra-lowered vehicles?issues such as fitting smaller tires and wheels, possibly removing fender liners, trimming fender wells, negative camber, etc. may need to be addressed. This kit is designed for show vehicles; Please consult with your installer before purchasing.