Body Melt from 1993. A warped dietary supplement company tests it's new product on an unsuspect cul-de-sac. It has an amazing fuckin score, and some of the gnarliest body horror I've seen.
Battra is waay cool, and its a shame they never really appeared again. Have you seen the prototype of Battra, Gigamoth? It would have been a twin of Mothra that came from the same egg, but suffered mutations caused by radiation.