Beefy, what you fail to understand is that while it may be a small crack now, these have a habit of suddenly breaking wide open. All the coolant spills out and the throttle no longer meters the air. The car will stop dead at that point, no matter how much coolant he puts in! The intake is plastic, and there was a design flaw that causes them to fail. The replacement part is redesigned and the high stress part of it is now metal.