[cmargosi]

All,

Having spent a lot of time taking sage advice from the folks at Bimmerworld, I was excited see the addition of a new tuning product on their website.

Was thinking of giving this a shot. Undetectable from warranty perspective and impressive gains.

standard controls - https://www.bimmerworld.com/Chips-So...rive-N63R.html

app controls - https://www.bimmerworld.com/Chips-So...rive-N63R.html

Anyone had a Speed Buster? Bad name, but if Bimmerworld says its good, it always is....

[r33_RGSport]

Have you ever heard of RaceChip?
It is much more known brand in Germany than other brands.
Such as; DTA Tuning, Speed Buster, etc.

I have sold RaceChip for over 3 years.
Most of my customers are in the F15/F16 X5/X6, F85/F86 X5M/X6M family.
Currently using it on my G30 540 for over a year already.
And sold a few sets to M550iX and 540i G30 platform customers already.

[mike@x-ph.com]

Hi OP,
I would go with the Jb4. It is by far the most advanced piggyback available.

Comes with 14 days money back guarantee when you order from us.
If you do not like it, send it back