SteamSpeed STX 71R Ball Bearing Turbo for Subaru WRX & STI 8cm² w/ 3" inlet STI-TS At the center

At the center

With a few boltons and the SteamSpeed STX 76R

- turbine housing

The OEM unit  faired much worse at +31° F over ambient pushing the charge temps well over 100° F

The STX 76R installed on a N55 on an engine stand:

SteamSpeed STX 71R Ball Bearing Turbo for Subaru WRX & STI 8cm² w/ 3" inlet STI-TS At the centerUpgrading your turbo is one of the best horsepower increasing modifications you can make for your WRX STI. Also, selecting a turbo with the best components is essential to getting the most out of your investment. SteamSpeed Turbochargers combines the best in advanced compressor and turbine aerodynamics with OE quality manufacturing to produce the STX line turbochargers. The STX line of turbochargers from SteamSpeed feature Garrett GTX style billet