Flame-Thrower 40,000 volt canister coils can benefit virtually any distributor type inductive system. Its higher voltage allows larger spark plug gaps for added power, smoother response and better fuel economy. These coils are internally resisted so they are compatible with many ignition systems. Flame-Thrower oil filled coils offer great heat control for street driven vehicles, while epoxy filled coils provide superior winding support for high vibration environments in offroad vehicles and boats. It's also the perfect coil to go with the PerTronix Ignitor Breakerless Ignition.