V-Band Adapter Module, Smaller 4 bolt GT/T3 2.5" to 3" V-Band. Precision 3D CNC machined STAINLESS STEEL. Allows easy transition to industry standard 3" V-band. Design criteria were ease of use and compact size. This unit does not incorporate any welds and is solid in construction. Overall height is less than 1.25". Vband side is fully compatible with any of the V-flanges and clamps that we sell as well as all of our V-band based downpipes.