I've split 2 of their couplers in just a few thousand miles. I have an over the manifold setup for the piping. The 90* coupler off the compressor comes close to the FP manifold, doesn't touch, but it still enough heat to cause the inside radius to split.
I now have one of their heavier duty black couplers. We'll see how it lasts.
Easy solution would be to clock the turbo downward and redo the piping a little.