Acdelco 41-110 OEM Gm 12621258 Professional Iridium Spark Plug - Set of 8

MSD 88867 LS Coil Harness, Power Upgrade

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These harnesses allow you to easily connect your LS to a factory EFI system to take advantage of timing adjustments and settings.

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Product Review

These harnesses allow you to easily connect your LS to a factory EFI system to take advantage of timing adjustments and settings.

Corrects check engine light

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Acdelco 41-110 OEM Gm 12621258 Professional Iridium Spark Plug - Set of 8