Now, G-Power does make good hardware so do not get BimmerBoost wrong here but they are often overpriced for what you get. This is a good example. The G-Power SK-I setup costs $11,150.00 and the SK-II setup runs $16,150.00. For that money you get 399 wheel horsepower versus 448 wheel horsepower for the Active Autowerke Level-I kit which costs $8995. You can even go up to the Level-III for $13,995 and have much more power for less money than the G-Power SK-II.
It is not even as much about the power as the peak torque between the two is even but the G-Power tune is clearly leaving a lot to be desired. The torque curve gets choppy and drops off. This G-Power kit would likely look much better with a custom tune from another tuner. Regardless, why bother?
This perfectly highlights why G-Power can not beat US tuners especially when it comes to horsepower per dollar. It seems to live more off being a name brand in Europe than anything else.