It looks pretty good for a that price. You would still have to build your fuel system since it doesn't come with any of that, but I prefer to do that anyway. I'm not fond of the manifold either. It looks like it would be durable being ductile cast iron, but I don't like the way the wastegate exit is comes off only one cylinder. Kinda creates an uneven exhaust flow out of that one port and causes alot of turbulence in the wastegate bypassed exhaust. I wouldn't try to build a 400hp car with that manifold but it would be fine for a street kit though