6L80 - 6L90 - 8L90-10L90-Allison Cooling System Upgrade TransGo 6L80-CLR-BYPASS*

An easy, no-hassle cost-effective drop-in Cooler Flow Bypass Delete Kit for General Motors 6L80, 6L90, 8L90 and Allison 1000. 8L90 2016-On. 6L80 - 6L90 2014-On. Allison 1000 2017-19. TransgoCooler Flow Bypass Delete Kit.

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