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      12-15-2012, 07:38 PM   #20
Mike Benvo
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Drives: Harrop SC M3 / E46 M3 / 7Turbo
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Quote:
Originally Posted by Superfly_M3
NGK makes plugs with knock sensor? is that what OEM uses?
There is no conventional 'knock sensor' on the OEM plugs or these NGK's

The combustion quality detection is a function of the coils themselves and the feedback received from the plugs.
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