Ignition coil Motorcraft Finewire spark plug 12x kit Ford Lincoln Mazda Mercury. Our direct fit replacement US Aftermarket Brand ignition coils, part number IGNUF553 with premium Motorcraft Finewire Platinum spark plug, part number SP411 (AYFS22FM) 12 piece kit built using high grade material like metal and copper wires/enamel covered wire from Germany ELEKTRISOL, epoxy glue from Japan KYOCERA, shell and its plastic mainly using BASF of Germany SABIC etc. The Finewire Platinum spark plug was designed to improve electrode wear beyond the capability of the Single Platinum spark plug. The ...