Fiberglass Branch "Y" Connector. It is 3" X 3" X 5" with an overall length of 15".
Changing sizes from manifold to transom, plumbing a new exhaust system, or refitting your existing system, These Connectors and Couplers will make your job easier. The composite construction will give you years of trouble-free service. These components are engineered to be compatible with all other Marine Muffler parts.