2005 Subaru WRX STi – IAG 600 Build

Subaru | WRX STI : November 16, 2020

After experiencing bearing failure with the original EJ257, Matthew decided to take the opportunity to turn up the wick on his 2005 Subaru WRX STi! Build setup below:
Extreme Turbo Systems front-mount intercooler
Invidia Exhaust down-pipe
COBB Tuning 3-port electronic boost control solenoid
Performed by us:
IAG Performance 600 long block with Stage 2 V25 CNC ported cylinder heads
GSC Power-Division valve train and S2 camshafts
ARP cylinder head studs
Forced Performance Turbochargers FB Blue turbocharger
Killer B Motorsport equal length Holy Header
TiAL Sport 38mm MV-S wastegate
COBB Tuning turbocharger inlet
IAG Performance Street Series air/oil separator
Getadomtune cylinder 4 cooling modification
• STI 11mm oil pump
Injector Dynamics ID1050x fuel injectors
Injector Dynamics top-feed conversion fuel rail kit
COBB Tuning Flex Fuel conversion
AEM Performance Electronics 320lph High Flow in-tank fuel pump
Advanced Clutch Technology HDSS clutch kit
Advanced Clutch Technology streetlight flywheel
• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installation
With the mechanical work wrapped up by Andrew in the shop, Matt strapped her down to the rollers for Vlad to perform a custom Flex Fuel calibration via COBB Tuning's Accessport V3. Since this car is shipping back out west, we calibrated for 91 octane rather than 93 octane. However, even on the 91 octane calibration, Vlad increased output to 374.66awhp & 471.28lbft, and then with E85 in the tank and the FB Blue delivering ~28psi, output increased to a strong 475.66awhp & 471.28lbft!

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