[pinguhk]

Originally Posted by djsaad1

Has anyone bought a sprint booster? The idea sounds great, but wondering if it really works.


https://www.sprintboostersales.com/d...%20or%20Diesel

yes it worked on all my BMW E46, E60, F10
but I have not tried it on the 640i yet.
I'm 50/50 on this item because when I shift it to sport the car on my 640i it dose push a bit with sport gear box so if installed I think it will jerk a lot and not a smooth ride. My E60 and F10 jerked a bit and both were 2.5L engines.