Pertronix 91281: The Ignitor II has many of the same great features that the Ignitor has, but its smarter. Ignitor II units sense the coil current level and use a powerful micro controller to adjust the dwell. Variable dwell helps to maintain peak energy throughout the entire RPM range. Ignitor II systems develop up to 4 times more energy between 3000 and 5000 RPM than standard ignition systems. High RPM performance is improved when used with the Flame-Thrower II super low resistance 0.6 ohms and 45,000 volt coils. // Pertronix 45011: While it’s the perfect coil to go with the PerTronix Ignitor breakerless ignition, their 45,000 volt Flame-Thrower canister coil 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 installation and wiring is drastically simplified. Pertronixs oil filled coils offer great heat control for street driven vehicles, while their epoxy filled coils provide superior winding support for high vibration environments in off-road vehicles and boats.