This is a welcome new part for the 3rd & 4th series Firebird & Camaro owners/ repairers.
On the outer frame as shown below lives the diff bump stops.. This will replace both for the price of less then one GM unit.
Explorer LOWER ball joint 95-02 (ea)
Honda Civic & CRX Master Kit: 88-91
79-98 Mustang Rear End control arm bush kit (w/round bushes)
Engine Mount: Chev V8 Short & WIDE - CHROME
59-64 Panard Rod Bush Kit
58-64 Front Control Arm bush kit
Sway Bar Rear Bush kit (8) various Jap 88-92
Honda Civic & CRX Master Kit: 84-87
62-72 A body Upper control Arm Bushes (4)
Performance Engine Mounts: 93-97 V8 (each)