What? Extra holes? This ain't no gold mine dipstick! Yes, but it is an Air Plane! It needs extra systems to ensure it will stay in the Air. Not extra weighty systems. Extra light weighty systems, like an extra spark plug and wire per slug! Makes good sense! If you are running a "Fat" mixture your single plug will not fuel wash! Of course it takes extra holes and Sparkplug Boot Tubes, like the old Hemi Motors. It also takes a darn good welder!