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Add to CartFor engines equipped with Delco EST and cannot be place in base timing mode with a diagnostic tool.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Sierra 18-5517 Delco Est Shift Interrupt Harness For engines equipped with a Delco EST distributor and requires a shift interruption lead.
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Sierra 18-5514 V-8 Delco Est Conversion Kit Converts 8 cyl GM engines to electronic. Contains: (1) 18-5443 Ignition Coil (1) 18-5515 Delco EST Distributor Coil to Module Harness (1) 18-5516 Delco...
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