Twin Turbocharger Gasket Set BMW 535d GT / 740d / X5 40 dx / X6 40 dx Turbo May 15, 2024twin535d, 740d, gasket, turbo, turbocharger, twinadmin Twin Turbocharger Gasket Set BMW 535d GT / 740d / X5 40 dx / X6 40 dx Turbo. This engine comes with a variety of turbo options. It is important to ensure that the part numbers on your current turbo match those specified in our advertisement.