Yes airplane engines have had them for years top fuel race cars got the idea from it.
Heh! 2 spark plugs per cylinder always makes me think of the Pratt & Whitney R-4360 Wasp Major used for the piston engine power for the B36 Peacemaker strategic bomber, AKA “aluminum overcast”.
That thing had 4 rows of 7 cylinders, 28 jugs! So a “tune up” involved changing 56 spark plugs on *one* engine, and there were 6 of them on the aircraft, so 336 spark plugs to be changed! Also 336 valves to check tolerances on and perhaps adjust.