Saves Money All New Components Great Ride Quality More Reliable Than Complicated Air Suspensions No Modifications Required, Easy To Install Premium Springs The 1993 Cadillac Allante Rear Air Suspension Conversion Kit With Relay Springs Mounts (CADR8) is the perfect solution to your air suspension problems. Designed to be very affordable, you can convert your air suspension to use passive shocks and coil springs for less than the price of replacing one original equipment air spring.