Feed your Mallory FireStorm Ignition with FireStorm CD Ignition Coils. Engineered to be the perfect match for an integrated ignition system, these coils can be used with most aftermarket CD (capacitor discharge) systems. The aggressive power of FireStorm Coils--up to 55,000 volts--will handle the most demanding normally aspirated, turbocharged, or supercharged application. Use for road & drag racing, Circle Track, or street. Sold each except #650-140051-8 is a set.