A friend of mine had gil's on his boat, and being 5'6" tall and 106 lbs, you know I was the one going in. After a couple of times of that I looked around and decided on the Stainless Marine. I had @ 1 inch if that between manifolds but I didn't have the tee's for water at each port. The risers are easy to take off and I could pull the valve covers without loosening the manifolds. They make them for the silent choice also.