Hello Bagu

No they dont make measurements before and after.
But it was my only option
For me the Warenty of two years on this new car is very important
and Hartge is a good stable Firm with a good name

Erwin

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BMW X5 3.0 SD
Hartge Power chip 335 HP, Hartge exhaust tips,
Sport package, Black Sapphire, Saddle Brown leather. Light Poplar wood interior trim, Sport package, Y Spoke Style 415, Active Steering, Comfort Access, Hi-Fi Sys Prof DSP, Running boards, Navigation system Professional, Voice control, Bluetooth phone prep, Comfort seats, Panoramic glass sunroof, Head-up Display, Xenon headlights, Auxilairy heating, High-beam Assistant, Airco with 4-zone control, and lots of more.