Aftermarket VNT nozzle ring often used in the GTB28/GTD28/GTD30 branded custom built aftermarket turbochargers.
Sizes on picture 3. Overall thickness 27mm, base plate is 99.7mm diameter with a hole 64.25mm diameter. Vanes around 7.5mm tall.
Please note this will not fit directly onto any GTB22 based turbo, there are additional custom parts and work needed which we do not stock, and we do not use these in our builds - we were asked to source them so customers could repair their existing 28/30 spec units.