For sale is an R33/RB25 GTST OEM Turbo with an already machined/serviced turbine housing.
The turbine housing was machined by Turbo Technics (UK) and has been fitted with a new penny valve and a larger opening for
a 53mm turbine wheel.
The whole assembly is the base for a great hybrid turbo with money saved on the already machined housing.
Ask Turbo Technics for options.
https://www.turbotechnics.com/hybrid-performance-turbos/
The turbine housing has never been used!