That's only sort of true. The injector sits right at the port opening, so some fuel is likely to get on the seals. Not as bad as a full wet carb intake I'll agree, but it's not perfectly dry. I can't imagine they would put a non-fuel resistant material in a place so close to fuel, but I guess stranger things have happened. The 6.1 intake is metal right? I was thinking maybe the factory seals just don't like the metal aftermarket intakes, but if the 6.1 is metal that theory goes out the window.