You'll never get all you can out of a performance battery for your 2005-2009 Mustang unless you also invest in a quality set of Mustang Coils and Coil Packs as well. With Mustang Coils and Coil Packs from famed aftermarket manufacturers like Accel, MSD, GMS and Ford Motorcraft, you can rest assured that your performance mods are getting the necessary juice out of your Pony's battery. Speaking of which, you can also pick up Mustang Batteries or a Mustang Starters to go with your Mustang Coils & Coil Packs.