Hi,
Don't worry about the numbers. I have a 340xi myself, with a tune, DP and exhaust.
I am pulling 100-200km/h in 8.8 seconds (on the speedometer). Before the mods, it took me 11 seconds, which makes a decrease of 25% resp. 25% increase in power. You should find similar numbers.
Cheers
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F30 340i xDrive - NoLimit PCU - ER catted DP - Lightweight Exhaust System - 19x8,5 ATS Superlight - Bilstein B16 PSS10
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