some may get up to 30% increase depend on engine like Audi 1.2L TSI will get up to 30%. Turbo's engine will get greater increase like 335i by just simply plug in Tuningbox you get the extra power instantly.

It really works on real life driving, I have sold many to 525i and 530i some just turn to mode 5 and they all were satisfied not even mode 8 yet.

 

Your 535i may get up to 40hp increase, it's not BS test it yourself 220USD can get you that much I think it should be more than enough.

 

I'm willing to do a before and after dyno run on my M54 if you send me a free unit

 

+1 And the fact that they changed their tune about the HP gains on the M54 (saying you'll see 30% on an turbo Audi) makes me call bullshit even more. Either you're claiming I get 30% more power out of my M54 or you're not - don't post bullshit numbers. How much gain EXACTLY could we expect out of the M54, I don't give a shit what you get out of an Audi.

I live close enough to RPI that I'd be more than willing to install, dyno and review, if you guys have anywhere near the gains you claim it shouldn't be much of a challenge - otherwise drop the 30% bullshit