|
The power increase is the least important/impressive aspect of the CP (indeed, having had both it's barely noticeable until you're right at the top end). IMO, even the CP wheel's which I first disliked (and now think look fantastic in real life) are way above the power increase!
Th reason you really want the CP is for the steering. It's all about the steering. Much much sharper and more natural in feel. Slightly further down the list, you may want the suspension upgrades as it takes a car that isn't immune to body roll and makes it into a remarkably flat handler without any discernible trade-off in ride. The lack of body roll in the CP is remarkable, given the weight it's having to contain.
So, back to my first point, the power increase would be right down the list and you may as well go for an aftermarket tune if thats all you want - whether it's the BMW file or not, if it's not installed by BMW then I think they would look on it in the same (negative) way when it comes to warranty.
IMO, these car never needed anymore power for the road but the launch-model M6 I had definitely did need better steering.
|