An ignition coil and {HEAD ~ spark plug} are associated with {TAIL ~ each cylinder} of the engine 
associated with
An ignition coil and { HEAD ~ spark plug } are associated with { TAIL ~ each cylinder } of the engine
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH