Quote:
Originally Posted by h_bakken
Does OPF affect performance?
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In general terms, yes it does. BMW revised the torque and power ratings on the F8X in the EU after the introduced the OPF.
However, on engines that have been designed from the onset to use an OPF, I believe engines will be tuned from factory to have the same power with or without the OPF. Engines without OPF will however have greater power headroom for aftermarket market ECU tuning.