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The MSD 8739 Two Step Module Selector is a performance part designed by MSD Ignition. It allows users to easily select and use RPM modules with their MSD plug-in ignition systems. Primarily used with the MSD 6AL and 7AL ignition boxes that do not have launch RPM capability. This allows launch RPM while retaining the high rpm rev limit function. This item is used but in working condition. I went to an MSD Digital Grid and no longer need. Shipping is a flat rate of $12.00 to lower 48 states only. Pay Pal only.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.