Originally Posted by gunnerman
I've heard two different things about the size of the 09 WRX turbo size.
The turbine and compressor are the same size dimensionally as the STi's VF39/43/48. The compressor cover is of the LGT/+08WRX fitment variety(2 bolt flange pointing at 12o'clock). It is NOT the same turbo as any model year STi however wheel dimensions & performance potential are the same as a stock STi turbo.