There are three things a gasoline engine needs: air, fuel and spark. The spark plug ignites the air/fuel mixture, producing the combustion that powers the engine. Despite the fact that spark plugs have featured in vehicles for more than a century, manufacturers are still pushing back the technical boundaries. In this interview, Matthew Beecham talked with Sean Lyon, senior product manager, Autolite and Jeff Boehler, chief engineer, fellow, Autolite about the spark and glow plug market.