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Project Subaru Sti Turbine Housing

You can visually see the difference in the internal passage size between the 6cm2 stock turbine housing and the 7cm2 FP housing.
Project Subaru STI Part 6

 You can visually see the difference in the internal passage size between the 6cm2 stock turbine housing and the 7cm2 FP housing.  View Related Article

 

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