For performance ignition systems, choose PerTronix. Flame-Thrower HV Ignition Coils feature an E-core design that yields 60,000 volts with no degradation. The heat sink design efficiently transfers heat optimizing energy output for street & off-road applications. HV ignition coils are available in 3.0 Ohm, 1.5 Ohm & 0.45 Ohm primary resistances. Get a PerTronix Flame-Thrower HV Ignition Coil fast with Speedway Motors' same-day shipping!