T3 to T4 Turbo Manifold Flange Adapter Conversion Cast New TURBOCHARGER MANIFOLD FLANGE ADAPTER T3 TO T4 Height: 2.5" This adapter is brand new, made of High Grade Cast Iron! Strong and Durable! This product allows you to install a T3 Turbocharger on a T4 Manifold or T4 Turbocharger on a T3 Manifold. Excellent for Turbo Swap Projects!