Quote:
Originally Posted by xlover
It is for emissions not fuel economy
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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you are correct, the euro one had the same engine but it output way less power due to the OPF