OEM Equivalent Part Number: UF557, C1587, IC637, GN10346, 5C1644, E1057, 52-1881, 4606824AB, 4606824AC Coils and spark plugs. Premium Performance: LCWRGS coils and spark plugs are built to achieve or exceed OE specifications, Highly conductive copper wire and high dielectric performance epoxy ensure excellent connectivity and long service life.