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Product Description 1 Pair AN6 6AN x 1/4NPSM Transmission Oil Cooler Adapter Fittings For GM 4L80E Description: Fits most of 1997 to 2007-11-28 GM 4L80E transmissions 6AN x 1/4 NPS is the correct thread size for most of the GM 4L80E transmissions. In 1997 GM moved one of the cooler lines to the back of the transmission. The front adapter is short and the rear is the longer one with the tube. This is very crucial to the cooling circuit of the transmission. These fittings measure 0.520" across the...

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