Ad Auto Parts brand has built its reputation by engineering and distributing a full line of genuine import parts - parts that are unrivalled for quality, original look, fit, form & function, as well as coverage.. As a tier I manufacturer with engineering and design capabilities second to none, our ignition coils are of robust design and the highest quality standards. High dielectric epoxy is injected into the case and pulled into a vacuum to eliminate air pockets and prevent moisture intrusion or thermal breakdown. Neodymium in the core creates the strongest magnetic field and produces max high voltage output at all speeds. Our Coil-on-Plug assemblies are manufactured from the finest components for optimum performance and a long service life under all operating conditions. Our reinforced bobbins prevent voltage flashover for an extended service life.