Redcat Racing Part BS503-006 Middle differential unit. Compatible with the\nfollowing Redcat Racing vehicles: shredder. Redcat Racing is located in the\nUnited States and has a full staff of support personnel to help you with your\nRedcat Racing product. Consult your vehicle manual for correct fitment and\nassembly. Since 2005 Redcat has been your source for fast - affordable - fun!