These late model Ford coils are designed as direct replacements for Ford Shelby GT350 and GT 500 5.2L engine, so they mount in the factory location and simply plug-in to factory connector. If you are looking for an upgrade from stock, MSD Blaster ignition coils will provide the power, reliability and quality you've come to expect from MSD name. MSD developed a replacement coil that incorporates improved windings and material to increase the output of the coil. Also, when other modifications are being added, you can rely on the Blaster Coil to recover quicker through high rpm with a powerful spark to promote combustion. MSD continues to expand its performance ignition line with coils for late model Ford applications.