Thread: Spark plug gap?
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      05-14-2012, 01:20 PM   #2
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Multi-ground spark plugs like the OEM NGK LKR8AP plug are not gapped by the installer and are sold pre-gapped from NGK or BMW.

Although this quote is from the Bosch website it holds true for all multi ground spark plugs:

"Gaps should never by adjusted on dual or triple ground electrode spark plugs, Platinum+4 or
Platinum2. These plugs have have factory pre-set gaps, and should never be gapped by the
installer. "