NGK Spark Plugs, LFR6A-11 #3672 - 8 Pack. Stock up on dependable ignition performance with the NGK LFR6A-11 standard spark plug in an 8 pack. NGK standard plugs are chosen by more automotive, motorcycle, and marine engine manufacturers than any other, thanks to a proven copper core and an electrode design that supports fast starts, consistent combustion, and long service life.. Whether you are servicing multiple cylinders, keeping spares on hand, or maintaining more than one engine, this 8 pack