These Schumacher Racing Products rear transmission housings are a factory replacement for the Cat PB 4x4 buggy platform. The set includes two housing halves that clamp together to enclose and protect the rear transmission assembly. Molded in durable dark gray composite plastic, they are a direct-fit replacement for worn or damaged originals. Features: Includes both rear transmission housing halves Composite plastic construction Direct factory replacement for Cat PB 4x4 Bolt-together clamshell design 7/7/26 cs