HIPA 394891 392329 590781 Ignition Coil Armature Magneto for Briggs & Stratton Horizontal & Vertical twin (L-Heads) Engine Replacement manufacturer part number: 394891 392329 590781 Fits Briggs Stratton horizontal & vertical twin (L-Heads) model series 401415, 401417, 421417, 421431, 421437, 421707, 422707 433431, 422435, 422436, 422437, 422777, 42A707, 42A777 422707, 460707, 460777, 461707, 462707, 463707, 590781