I knew that this was going to happen....
Ok, before we scare everyone, I'd like to say that almost every Boxster Spec race car has a LWFW and the BSR/SPB fleet (which are driven harder than any street car) has not reported any such failure as common. I'm not saying that its not possible, just not common.
My Boxster has 136,000 miles on the engine. The last 45,000 miles have been with a LWFW and include 85 track days and over 10,000 runs to redline (and a few beyond redline
), all without a problem. Your mileage may vary.