Geeeeezzz,
No body loves me everybody hates me so I'm gonna go eat........

OK here is what it is...
A Sprint Booster corrects the inherent drive by wire throttle delay making the car more responsive. When you go to accelerate and the car hesitates for a second that is throttle delay.

NOW before all the questions start ....
NO, IT DOES NOT INCREASE HP!
NO, IT CAN NOT BE MEASURED ON A DYNO!
AND FINALLY
NO, IT DOES NOT INCREASE HP!

It is the best mod I have done to my car and for the record I have done many mods in the three years I have owned my XF.

There its done.

My name is PAULW and I approved this message.