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      10-17-2020, 09:46 AM   #12
xlover
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Drives: 2023 X7 40i
Join Date: Aug 2011
Location: Boston

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Quote:
Originally Posted by Dog Face Pony Soldier View Post
I'm actually surprised BMW doesn't put them on US vehicles anyway. I recall BMW saying they were going to adhere to the higher fuel efficiency mandates even after the US claws back the severity of the regulation.

It is for emissions not fuel economy


Quote:
Originally Posted by Jcali86 View Post
Quote:
Originally Posted by h_bakken View Post
Does OPF affect performance?
No impact, but it ruins the sound.
Actually i believe early implementation did affect engine output on some versions, I think the eu m340 is still rated at 374 hp and the z4 launched in Eu with 335 hp when the us had 382. Not sure if that is 100% opf related
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