I have one on a stage 2 KO4 car and all the right noises are present and correct.
You haven't said if yours is mapped or KO3 or 4 but you have kind of indicated that it may not be mapped either way, so I'll assume not...
I couldn't say how an unmapped vehicle would take an intake, I feel it could be questionable. There'll be those that say it's absolutely fine but personally I might not have bothered. Stage 1 doesn't
need an intake either, in fact stage 1 cars drive really nicely on a standard box in everyday circumstances.
If you're unlucky at stage 1, particularly with an intake, your HPFP
may struggle to maintain a good air fuel ratio (AFR) - this is REALLY important. Bit of a lottery as some pumps make it OK and others don't. Wear and manufacturing tolerances come into play.
Have you noticed a drop in low end torque since having it fitted? It's possible, even likely, that you may have noticed that it drove better on the standard intake. If you haven't noticed yet I think you might once you're over the honeymoon period.
People also knock out the pre-cat for their own reasons. This also has the effect of relieving the turbo of a little back pressure which would have had the effect of assisting the turbo in spooling nice and early. So this and an intake for example may sound great but the real world driving experience can be negatively affected. There'll be a placebo as the noise will entertain some when given the beans.
If I were asked I would say leave an intake alone until stage 2 and buy a stage 1 map instead.
Just for info KO3's map nicely to stage 2 as they don't suffer compressor surge like the KO4's. It's not all about big numbers