Team Z Motorsports offers a Rear Suspension Shim Kit for your 1979-2004 Mustang. Our kit comes with (2) 1/4â€³ and (2) 1/8â€³ thick aluminum shims for fine tuning of your cars overall ride height when using our Stock Relocation Springs. This is the same kit that comes standard with our 94-04 Stock Relocation Springs. Our kits are CNC Waterjet in house out of 6061 Aluminum to offer great strength without adding extra weight. Proudly made in Detroit, Michigan.