If you're taking it to who I think it is, then I wouldn't worry about it... I'm pretty sure he won't say anything. Just take off the EZ so it is not in his way, and leave the brass elbow in, and if it sets an overboost code(which I don't think he'll be driving it that hard), then so what? the code will clear itself after a few starts/runs.
You have an extended warranty that you paid extra $$$ for... they can't deny coverage on it.
-Mike