The Ignition System assembly is constructed from several parts from which the Igniter is the most expensive.
Some items from this specific schematic: Screw-pan-ws-cros, Dp8ea-9 (ngk Sparkplu, Dpr8ea-9 (ngk Sparkpl, Igniter.
Of all the components that make up this Ignition System the Bolt-flanged has the lowest price.