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