Quote:
Originally Posted by mainly
sorry this is very hard to believe.
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I don't find it so hard. Actually, the numbers he is posting after installing the plates reflect ACTUAL numbers recorded on stock F10s by many people. Seems to be becoming pretty common knowledge that BMW grossly understated the HP and Torque on the stock cars. Likely that the hole in his box "took away" and the plates simply restored the power.
Also, the charcoal deletes do seem to work. I did mine and it feels a bit more "loosened up" the same way it did on my E60. I don't know about necessarily 15 hp but it is enough to be noticed.