Boomba has claimed large gains from both of their spacers but I have a veteran pro tuner warning me the issues it may cause. But from experience that bov adapter will be an issue with a pro tune and Ill be anxious to install my garret 2860 gtx and fix that with a tial q ofcourse. The electric diverter valve is a pain.
We'd love to hear more about why your tuner thinks these would cause an issue. There are countless people running custom tunes along with our BOV adapter with no issues whatsoever. What our BOV adapter does is that it essentially spaces out the stock BPV. Any behavior that can be heard when using this part is the same thing the factory BPV adapter would have done before, it is just being made audible now through the use of this part. We see no way how a part like this would cause any heat soak, at all. Before releasing these BOV adapters we put our shop car through extensive testing to ensure that there were no negative effects of this part. The purpose of this part is to give you the satisfying BOV noise. Another benefit of the BOV adapter is that it helps by reducing blow-by by venting to atmosphere rather than venting back into intake. Just to be clear, we never claimed any sort of HP or TQ gains from using this BOV adapter.
As far as our intake manifold spacers and throttle body spacers, this is the wrong thread to comment about those on. We also want to clear the air on those as well. All of the gains from our intake manifold spacer and throttle body spacer were dyno tested and the graphs that you have seen are unmodified. As far as large gains (2HP and 17TQ) we are willing to stand behind those claims. The dyno charts are from running the same car, on the same dyno, on the same day, with the same tune. We really wanted to take any guesswork out of the equation.
Please let us know if you or your pro-tuner have any questions, as we'd be more than happy to help you out and answer them.