Ignition coil

An ignition coil (10) for an internal combustion engine includes a magnetically-permeable core (16) extending along a core longitudinal axis (A), the core (16) having a pair of end surfaces (46, 48) on axially-opposite ends thereof. The ignition coil (10) also includes a primary winding (28) disposed outward of the core (16), a secondary winding (34) disposed outward of the primary winding (28), and a structure (18) comprising magnetically-permeable steel laminations (52) having a base (20) and a pair of legs (22, 24), the structure (18) defining a magnetic return path. The core (16) is disposed between the pair of legs (22, 24) such that the core longitudinal axis (A) extends through the legs (22, 24) and the end surfaces (46, 48) face toward the legs (22, 24) and at least one of the end surfaces (46, 48) of the core (16) is spaced apart from a respective one of the legs (22) to define an air gap (54). The structure (18) is over-molded with an over-molding material (56) such that the over-molding material (56) fills at least a portion of the air gap (54).