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320i vs 328i
The 320i and 328i's engine, fuel system, intercooler,downpipe etc etc are exactly the same. Differences would include smaller brakes and exhaust which can be easily changed.
This has been discussed to death in other regions where N20 320 and 328 are available
The only difference is the boost level that the ecu allow the 320i to make which is definitely lower than that of the 328i. This is how BMW differentiates the cars and control the HP output.
So right now once aftermarket tuners circumvent the DME and reflash the 320i engine maps with that of the 328i the 320i is game!!
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