HEI ignition systems rely on a good module and a good coil. The combination of a great module and a great coil makes the Flame Thrower distributor from Pertronix the best. Superior Ignition performance without misfires up to a minimum of 7500 rpm, nearly 3000 rpm higher than most enthusiasts report with their original HEI. Compared to stock HEI units, this one produces 67% more energy in the coil with 45% faster spark breakdown time. Limited One Year warranty. Legal in all 50 states and Canada (C.A.R.B. E.O.#D-57-5).Proudly made in the USA.