Originally Posted by PhoenixRising
I agree with Mike. It could be said that 414hp is an achievement in its own right. In fact the twin turbo V8 in the X5/6 non-M SUV's have an extra 100hp that Dinan can pull out with their tune and boost control.
I think it also allows for car manufacturers to monetize on those who want every bit of HP left on the table.
The X5M/X6M has a lot of untapped room.
Here is a link with a dyno on one of them that we did awhile ago:
And a little vid from one recently.
They are VERY fast with a tune. Pre tune I used to beat the X5M in the first link. Post tune is was a different story.