Assertion: plasma ignition | /r/HasProperty | an electronic ignition system
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text: High energy ignition, also known as H.E.I., is an electronic ignition system designed by the Delco-Remy Division of General Motors, and introduced on some GM vehicles in 1974, including the Camaro Z28 Special High Performance (with 3123 units factory installed)[unreliable source?] and 1974 Buick Century Gran Sport Stage 1 (distributor code 1112521).[citation needed]