I used the stones, gasket and grease that come in this kit. The equipment will not fit in a 1993 Corvette, although Revane said it "will fit in your 1993 Corvette." Good news: if your headlights start spinning after you spin, the pebbles have probably been chewed up into a powder (I had). The gear had no wear so I reused it and everything was fine again. If you are looking to rebuild your headlight motors I would only buy pebbles, gasket and grease if those are included.