JMPF Black -6 an to 1/4nps Transmission Fittings Gm Turbo 350 400 4l60e 700r -6AN to 1/4NPS GM Transmission Cooler Fittings with Sealing Gasket This fitting is the correct size for GM Turbo 350, Turbo 400, 4L60E, 700R4 and many other GM Transmissions Made in The USA Nylon Washer 6061 Black Anodized Aluminum