Genuine Cummins Aftercooler Core for Cummins QSC 8.3 Series Engine (3966698)

The Early Style, 3966698 aftercooler core fits ALL original style (non-MOTA) QSC aftercooler housings. However, aftercoolers of the later design that included an aluminum spacer ring, will require the use of the earlier bronze cap (3966699, no ports). If you have the later version, an early style cap will be included with your order. Call if you have questions.

See the product description below to determine which version you have and what parts will be required.