B52 - Center/Dual 10" Body: 3" Inlet - 2¼" Outlet
B52 - Center/Dual 10" Body: 3" Inlet - 2½" Outlet
B52 - Dual/Dual 18" Body: 2½" Inlet - 2½" Outlet
B52 - Dual/Dual 18" Body: 3" Inlet - 3" Outlet