I bought a set of Rex marine exhaust for my Baja 250 I was told they were for a big block bravo boat so I had a marina put them on my boat and they just called and said they got them all on but the don't line up with the holes through the hull of my boat and he is talking about getting a wedge fabricated to change the angle is there something out there that someone already makes to do this

How close/far off are they? If close maybe a "Hump Connector" from Shields.