Seakamp Engineering transmission oil cooler for original Mercruiser 807996-T measures 12 1/2 inches overall length with 1 1/4 inch water hose connections. Replacement Mercruiser Transmission Oil Cooler | Seakamp 807996-T Seakamp Mercruiser replacement oil cooler 9 inch cooling core bundle length 12 1/2 inch overall length 1 1/4 inch water hose connections 1/2 inch inverted flare #8 hose oil line fittings Replaces Mercruiser 807996T