Pertronix Flame-Thrower HV Coils yield an incredible 60,000 volts, operating without degradation throughout temperature ranges that surpass military specifications. HV Coils are available in three primary resistances: 0.45, 1.5, or 3 ohm, which makes them compatible with most points-type and electronic ignition systems or capacitive discharge boxes on 4, 6, and 8-cylinder engines. Made of 6063 T5 aircraft aluminum, the special heat sink design efficiently transfers heat to optimize energy output for street/strip and off-road applications, and the heat sink extrusion installs easily and permits alternate routing of wires.