we have a 2006 Z4 3.0i and would like to change out the chips to increase the horsepower a bit. coes anyone have a suggestion as to which chip is the best? thanks!
No chips. You will have to search around to see which companies will do a software update for your car. I just don't know for the 3.0i. The ones to look at off of the top of my head are ESS, ActiveAutoWerk, Dinian. These are not cheap. The HP to benifit ratio is very low. I do know that a performance software upgrade from ESS for my Z4M is $789.
