I was at my local performance shop and they order one in with fuel rails for a 2013 F1 procharger 5.0. I must say I'm not impressed with the quality of the manifold for being 2400 dollars. There is a huge lip in the runners that would have to be smooth out or you would be wasting horsepower. And the welds of the intake I think could had be done a lot nicer. Anyone else seen one?