Proflow's PowerSpark's are engineered to significantly improve spark output over stock ignition coils, offering a maximum output of 45,000 volts. These black coils pair well with stock or Proflow's performance ignition systems. Each coil's alkyd tower assembly offers high dielectric characteristics, while wide-spaced brass primary terminals are designed to prevent the possibility of a spark. They also have an oil-filled metal canister and will fit stock mounting brackets.