Part Specification: Material: 1018 CR Billet Steel ( not Cast ) Thickness: 1/2 inch (.500″) or (12.7mm) T4 Inlet Bolt Diameter: M10 x 1.50mm Threaded Holes T4 Inlet Bolt Spacing: 2.75″ x 3.25″ (70mm x 82mm) T4 Inlet Port Shape: Divided Twin Scroll Ports T6 Inlet: Bolt Diameter: M10 x 1.50mm Threaded Holes T6 Inlet Bolt Spacing: 2.75″ x 4.44″ (70mm x 112mm) T6 Inlet Port Shape: Divided Twin Scroll Ports Fitment: Used to Bolt a T4 Divided Turbocharger to a T6 Divided Manifold which has Threads M10 x 1.50mm Notes: Gaskets NOT included in listing. The low profile Bolts are provided with the flange.