Quote:
Originally Posted by UltraDave
A 9% max potential HP gain (49 hp) on the M50i does not seem like much. I wonder if the wife would even notice it. Do they give refunds if you arent satisfied? Dinan has a 40 HP boost kit for the 40i with a base of 335 HP.
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They do offer 30 days satisfaction guarantee which I also honor.
I agree, on M50i not much gain compare to the 40i.
My guess, BMW maxing out the capacity on M50i engine. Unless you are doing a flash tune where they can change the AFR beyond factory safe zone.