Sprint booster i have tried it and didn't do any difference for me. I also drive in Manual mode , so with sprint booster its like if you just step on the gas more aggressively... I have ECU remap from Hartge but from day 1 so I cant really tell the difference... Mine has a little lag but I don't know if its from the transmission or from the turbo ???? I have to drive another X to really tell..

I agree D/S makes the car more peppy to drive, but it also ruins the mpg. I once tested and got about 4mi less than normal on a gallon of gas.

Ruins is not the appropriate word. suck is.... It wasn't since this summer that I realized how economical is driving in D mode because I had a hall 1000 km trip only on D. I always thought to my self that the ECU remap made my car more thirsty! but the truth is that I always drive in Manual mode plus I step on it...:dunno: