Quote:
Originally Posted by photos_by_ronnie
I have a 335i N54 where a JB4 adds 80 whp. I don't know the exact number of what the JB4 adds on an M2, but it's nothing remotely close to that. Maybe 20-30 HP? Not worth risking warranty over that little bit of HP. I've been modding and tuning cars for a while now, and 20 HP gain can barely be felt in most driving situations.
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Why would you lose warranty over a tune? Just remove it before your visit