The boxs are setup for 2 10’s right now but you can enlarge the holes and drop in 12s no problem. The combination of the two boxes can hold two amps. The one red neon comes with the boxs if you want it.
They will fit 100% for sure 95-99 2drs. Should fit the 95-99 4drs. It will most likely fit 00-02 2 and 4 drs. If you want to try and see if it fits in your 03-05 cavailer feel free to stop and try. You will have to get rid of the spare tire for the boxs.
These aren’t mine but my friends you can msg me if you want his number to talk to him about them. He had a cavy but has since got a cobalt and there taking up space in his room.