CTS Air Suspension Kits are very popular. An air suspension kit is an incredible upgrade. Upgrade with CTS Air Suspension Kits. The custom CTS Air Suspension Kits we sell include all the suspension parts you need. CTS Air Suspension Kits set your vehicle apart. With an aftermarket air suspension kit, you will rule the next car show. CTS Air Suspension Kits are high quality. Ditch your underperforming stock air suspension and replace with an air suspension kit.