Hi guys, 1st post!
I bought a 5k mile frozen white f10 m5 last week and decided to get it mapped by a tuner that I have used on my diesels in the past.
Here's the before, at staggering 636bhp out of the box?
And here's the after, an even more staggering 702bhp- an 86bhp,increase
Is his rolling road badly calibrated or is this possible?...
Thanks chaps,
Martin