I am amazed at all the promotion of what is essentially a throttle gain control. It turns up the volume of an electronic throttle, nothing more. A link posted earlier in this thread even gives the % amplification.

Yes, I can understand that people like a more responsive throttle pedal. That is why BMW invented the adaptive throttle, to respond more closely to a driver's usual throttle-mashing style. Floor it all the time, and it becomes more responsive; use a steady foot on it and it becomes more relaxed. Nothing changes except the gain, or relative throttle result for a fixed throttle movement. There is no more hp. That being said, there certainly can be a different pedal feel. But it does cost ya....

I have a brilliant suggestion. Most people place their right foot in the same place all the time. Check you floormat, and you will see the indent from your heel. Now, if you press on the middle of the throttle pedal, you will get a certain throttle result from 1" of travel. Pay attention, here is the tricky part: move your heel. Press in a different spot on the pedal. Voila! You have now installed the Sprintbooster II! Unlike the prototype first version, it is infinitely adjustable! It is reversible! It has no impact on your warranty! It is undetectable by the dealer! Instead of a puny 30% gain improvement, you can double the throttle response, or more. If you try this, please be sure to send $29.95 to me. That is a 90% discount, certainly worth it for a $70 k vehicle.

Have a nice day.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue