These TiAL V-Band Flanges are CNC machined from 304L stainless steel to ensure leak free seals for the MV-S, MV-R, V44 and V60 wastegates. These flanges feature chamfered edges and counterboring, the opening is a perfect match to the wastegate ports. Counterbore Sizes: TiAL 38mm (MV-S) Wastegate Flange Counterbore: - Inlet: 1-3/4" OD Tubing (1.75") - Discharge: 1-1/2" OD Tubing (1.50") TiAL 44mm (V44/MV-R) Wastegate Flange Counterbore: - Inlet: 1-7/8" OD Tubing (1.875") - Discharge: 1-3/4" OD Tubing (1.750") TiAL 60mm (V60) Wastegate Flange Counterbore: - Inlet: 2-1/2" OD Tubing (2.50") - Discharge: 2-3/8" OD Tubing (2.375") TIAL 60FLI #001058 Wastegate 60mm Inlet Flange