In older vehicles this is done via an Ignition Distributor, with newer vehicles using Multi-Outlet Coils with Ignition Leads connected directly to the Spark Plugs. HT Leads, ignition cable, plug leads, ignition wires.
CA101 HT Leads Ignition Cable Set Wire Kit High Tension Voltage By Starline
BBT ZK414B HT Leads Ignition Cable Set Wire Kit High Tension Voltage Replacement
HT Leads Ignition Cable Kit 73992 Intermotor MD342893 MD342894 MD365102
HT Leads Ignition Cable Kit HOES440 Lemark
