Quote:
Originally Posted by ngbernie
Any issues using back the stock ones for tuned engines? I'm not sure if there is any improvements.
You did the ECU tune? I remember you mentioned about failed engines after tuning, did they isolate the faults or directly link it to the tune?
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i make a soft tune the failed engines are 220+ hp
the stock one dies quickly they say. they're using 135i plugs but im worried about its size