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Originally Posted by Dog Face Pony Soldier
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.
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It is for emissions not fuel economy
Quote:
Originally Posted by Jcali86
Quote:
Originally Posted by h_bakken
Does OPF affect performance?
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No impact, but it ruins the sound.
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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