SteamSpeed STX 67 Turbo for Subaru WRX & STI Focus RS this turbo reduces spool time

this turbo reduces spool time and maximizes boost response across the RPM range

76mm exducer

The STX 58 twin turbos are also designed to still be responsive and therefore still fun to drive around town with the torque still coming in before 4k RPM

This data is from a 135i with PWG-style N55

SteamSpeed STX 67 Turbo for Subaru WRX & STI Focus RS this turbo reduces spool timeUpgrading 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