works as promised

did not work from the beginning not aggressive enough

It did not work from the beginning: car could not start. I had to drive 65 miles to HQ to fix it. But, now, car starts even better than with stock chip. I can easy see emprovements: much quicker response, much better acceleration. A must for each BMW car.

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quicker throthale response, an an increase in rpm range

i have to purchase the transmission chip to get the extra 250 rpms

all i have to say is it finally makes up for the tbw that bmw fudged on .