I guess I should call them top covers. I ordered the ones for the single fuel line setup thinking the mounting was the same but no. I talked with Mark @ S&P. He said the single fuel line covers were for the later model motors. He said since mine had valve cover bolts around the perimeter of the covers, I would have to run the 2 line covers. So I will have 1 empty fuel line hole. Or run S&P smooth covers. Unless someone else has a better idea. I really like the look of the factory covers.