Delphi's coils are designed and endurance tested to resist the common stresses that cause failure
Delphi's ignition coils are engineered to Original Equipment specifications
Epoxy vacuum techniques reduce air bubbles in the epoxy, because having fewer air bubbles increases the epoxy's insulation quality and reduces the chances of energy punch-through failures
Delphi employs specific techniques during the process of winding to regulate the distance of wire between each winding. This is crucial as an increase in length leads to higher voltage variances, consequently causing increased strain that may lead to damage in the insulation and wire coating.
Delphi's ignition coils are designed with proven materials, such as high quality wires and wire coating that resists the cracks, pin holes and imperfections that most often lead to failure issues