I spoke today with a very burdened person who absolutely knows to make his BMW 525 (something old, E34?) has no speed limit and therefore should bring a full 270km/h on the road. Normal white I always think of tachotuning when I hear something like that but that seems to me already very exaggerated. I myself drive an E36 320 Bj 12.92 and have either one of the most accurate tachos or a slow car that my goes into the limiter at 215. You can always read in the forums that the 320 ́ger according to Tacho 230 and more bring… What do you mean??? Are 270 in it? Oh, the box is absolutely series. What else has recently won at ebay a control unit with tuning for my 320 – for great 6.- + shipping! Does not have any noticeable extra power just an increased idle speed and limiter up to 6900 u/min. What do you think?? Actually a bargain but I don’t really dare to install that – so look for an F Reiwilligen in the Leipzig area!!! mfg nick