Originally Posted by UK335er
Thanks a lot for the replies guys. Now that i know other mods are not necessary i am seriously tempted.
What if any change have you experienced to fuel consumption when driving normally?
My engine is definitely the twin turbo one as it does not have twinpower written on it.
My biggest concern is voiding the warranty on the car. People say the jb4 is not detectable but are you guys sure? Would i need to remove anything physical before i went in to a dealership?
Does jb4 interfere with the stock launch control feature?
I have taken my procede v5 to the dealer i think three times since i have had it and nothing. It has something that doesn't pick up the dealer when they scan. And I'm stationed in the germany so these dealers know a lot about bmw and still have never said a thing. just put it in map 0 and it drives as if it was stock.