The D.U.I. Racing Coil Kit is capable of 9000 rpm. That's almost twice the output of a stock HEI coil! The coil comes installed in a brass terminal cap and includes the rotor and nylon rotor hold down screws. Spark plug gaps can be widened to between .050" - .055" because of the higher voltage output of this coil kit. The wider plug gaps will allow more spark energy into the combustion chamber providing a better burn of the fuel mixture and increasing horsepower. The kit fits on ALL internal HEI coil applications.
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