I have the Dinan Tune. It increases the HP to 369 at 5700. The TQ peak is 382 at 4500. Redline is increased to 6500 because HP is still 347. After 6500 HP is going to drop off at an increasing rate.

Key to fastest time from A to B is to stay in the power band through the gears. Power band is some amount of RPMs below max HP and some amount of RPMs above max HP. It takes very little increase in redline to result in shifts that are too close to max HP and to far past the max.

I have other mods and have not increased the redline further. The reasons I haven't is that I don't know when the valve train can't handle the RPMs but I do know what happens when it can't. And the power band will change very little unless the cams are changed.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas