I've installed mine twice, once on stock turbo and then second time on X47. It's tight in both cases but if you use plenty of silicone on the fittings you can keep all of them in constant adjustment until it's just right and then tighten them all down. By doing this I found the 2nd time around I was able to get much better clearance and not touch anything. There are a few gashes in mine from the first install but I think they're all a bit battered. Nothing too deep though.
Bottom line, it's expensive, it's big, it's blingy, it's loud, it has very tight clearance, but it does fit and it will keep your temps down that's for sure. Whether or not it actually provides more airflow mass than any other setup is still a question.