Category: WRX STI
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2015 Subaru WRX STI Launch Edition- IAG Stage 2
Noah brought us his 2015 Subaru WRX STI Launch Edition to get the EJ257 equipped with our Stage-2 Tuff IAG Short Block package!Performed by us:• IAG Performance Stage 2 Tuff EJ257 short block• ARP 2000 series cylinder head studs• IAG Performance wrist pin & cover seal kit• IAG Performance V2 stainless steel oil pickup• OEM Subaru 11mm engine oil pump• IAG Performance Street Series V3 air/oil separator• NGK Spark Plugs LFR7AIX spark plugs• GDT cylinder 4 chamber cooling system• OEM Subaru oil pan, oil cooler, and associated components• OEM Subaru timing components• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installationPre-exisitng modifications:• Blouch Turbo 1.5XT-R turbocharger• COBB Tuning SF air-intake system• IAG Performance fuel rails• Injector Dynamics ID1050x fuel injectors• GFB blow-off valve• GrimmSpeed down-pipe with high-flow catalytic converter• Invidia Performance cat-back exhaust system• COBB Tuning 3-port electronic boost control solenoid• Killer B Motorsport unequal-length header• Extreme Turbo Systems front mount intercoolerWith the mechanical work wrapped up by Dylan in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased the EJ257’s output to 416.91awhp & 395.86lbft! -

2019 Subaru WRX STI – Bolt Ons & Tune
Jerry brought us his 2019 Subaru WRX STI for it’s second round of work! Modifications performed below:Round one:• Extreme Turbo Systems front-mount intercooler system• GrimmSpeed 3.00″ down-pipe with high-flow catalytic converter• COBB Tuning bolt-on turbocharger heat shield• COBB Tuning 3-port electronic boost control solenoid• IAG Performance cylinder No. 4 cooling systemm• Koyorad Cooling Systems, Inc. aluminum radiatorRound Two:• COBB Tuning V2 turbocharger inlet tube• Injector Dynamics ID1050x fuel injector set• COBB Tuning fuel pressure regulator system• AEM Performance Electronics 340lph in-tank fuel pump• PERRIN Performance pitch mount• PERRIN Performance equal-length header• AEM Performance Electronics boost pressure and oil pressure gaugesWith the mechanical work wrapped up in the shop by Dylan, Matt strapped her down to the rollers for a custom calibration by Vlad via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased output to 317.54awhp & 355.51lbft! Up next, fuel, and more jam! -

2016 Subaru WRX STi – IAG Stage 2 Closed Deck Engine Build
Collin brought us his 2016 Subaru WRX STI to have the EJ257 built and taken up a notch!Build setup below:• IAG Performance Stage 2 closed-deck EJ257 short block• ARP 2000 series cylinder head studs• IAG Performance wrist pin & cover seal kit• IAG Performance V2 stainless steel oil pickup• OEM Subaru JDM 12mm engine oil pump• IAG Performance Street Series V3 air/oil separator• PERRIN Performance black silicone turbocharger inlet tube• NGK Spark Plugs LFR7AIX spark plugs• OEM Subaru oil pan, oil cooler, and associated components• OEM Subaru timing components• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installation.Pre-exisitng modifications:• COBB Tuning SF air-intake system• Injector Dynamics ID1050x fuel injectors• AEM Performance Electronics 320lph in-tank fuel pump• GrimmSpeed up pipe w/ Tial 38mm• COBB Tuning down-pipe w/high-flow catalytic converter• Turbosmart 50/50 hybrid BOV• COBB Tuning 3-port electronic boost control solenoid• Killer B Motorsport unequal-length headerWith the mechanical work wrapped up by Andrew in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased the EJ257’s output to 321.73awhp & 370.43lbft! Solid pump gas performance that Collin is sure to enjoy! -

2005 Subaru WRX STi – IAG Stage 2 Tuff Engine Build
Approaching 190k miles, Brandon’s 2005 Subaru Impreza WRX STI’s current engine was still running fine. However, Brandon wanted to keep his WRX STI on the road for as long as possible, and still have loads of fun without the worry, so a plan was set in place to upgrade to a new short block from IAG Performance!Performed by us:• IAG Performance Stage 2 Tuff EJ257 short block• TOMEI MX8265 turbocharger• Injector Dynamics ID1050x fuel injectors• Injector Dynamics top feed fuel rail conversion• DeatschWerks DW300 340lph in-tank fuel pump• IAG Performance Street Series air/oil separator• IAG Performance V2 stainless steel oil pickup• GrimmSpeed EBCS• TOMEI turbo inlet• Cusco engine & transmission mounts• Advanced Clutch Technology HDSS clutch• Advanced Clutch Technology Streetlite flywheel• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installationPre-existing modifications:• COBB Tuning down-pipe w/ high-flow catalytic converter• COBB Tuning SF air-intake systemWith the mechanical work wrapped up by John in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased the EJ257’s output to 360.42awhp & 334.67lbft! Solid pump gas performance that Brandon is sure to enjoy! -

2004 Subaru Forester XT Conversion – IAG Short Block
Nearing 200k miles of enjoyment, Austin’s extremely clean 2004 Subaru Forester XT clone was ready for a refresh. Previously swapped with a EJ255, it was time for round 3, with a simple goal in mind: aim for 300+awhp and build it for longevity and reliability. With a plan set in place, Andrew got to work creating the ultimate daily-driven combo, a 2004 EJ257-swapped Forester littered with STI bits, a setup prized by the lot of Subaru enthusiasts.Build setup below:• IAG Performance Stage 2 EJ25 short block• IAG Performance wrist pin & cover seal kit• ARP 2000 series cylinder head studs• IAG Performance V2 stainless steel oil pickup• WRX STI 11mm oil pump• OEM Subaru oil pan, oil cooler, and associated components• OEM Subaru timing components• IAG Performance Street Series air/oil separator• NGK Spark Plugs LFR7AIX spark plugs• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installationPre-existing:• OEM Subaru IHI VF39 turbocharger• COBB Tuning SF-air-intake system• Invidia Exhaust downpipe w/ high-flow catalytic converter• STI top-mount intercooler• PERRIN Performance Up-pipe• Walbro 255 fuel pump• All Wheel Engineering,llc Kartboy.com short shifter and bushings• EXEDY USA Stage 2 clutch• Lightweight flywheel• COBB Tuning Accessport V3With the mechanical work wrapped up by Andrew in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased the EJ257’s output to 313.88awhp & 327.35lbft! Solid results for a killer daily driver! -

2017 Subaru WRX STi – IAG Magnum Block & ETS Rotated Garrett G30-900
Alvaro came into the shop ready to get his 2017 Subaru WRX STI to the next phase of it’s life, with a IAG Performance closed-deck short block, built heads, and a Garrett – Advancing Motion G30-900 turbocharger, tipping it over the 650awhp mark!Engine Work:• IAG Performance Magnum EJ25 closed deck short block• IAG Performance Fire-Lock cylinder head gasket set• IAG Performance 14mm cylinder head stud set• IAG Performance wrist pin & cover seal kit• WRX STI 11mm oil pump• IAG Performance V2 stainless steel oil pickup• NGK Spark Plugs LFR7AIX spark plugs• Headgames Motorworks “Street” package head porting• GSC Power-Division S2 camshafts• GSC Power-Division conical valve spring titanium retainer & spring seat kit• GSC Power-Division 36mm EJ257 stainless steel intake valves• GSC Power-Division 32mm chrome polished super alloy exhaust valves• IAG Performance pitch stop AOS mount• IAG Performance GDT cylinder 4 chamber cooling system• Koyorad Cooling Systems, Inc. Hyper-V core radiator w/ filler neck & Type- A red radiator cap• GrimmSpeed radiator hose kitForced Induction:• Extreme Turbo Systems rotated turbocharger kit• Garrett – Advancing Motion G30-900 turbocharger• TiAL Sport 44mm MVR• Extreme Turbo Systems ceramic coated v2 Maxflow headers and up-pipe• Process West polished street version intake manifold• Extreme Turbo Systems 4″ front-mount intercoolerFuel System:• Radium Engineering dual fuel pump hanger w/twin Walbro 450lph fuel pumps• Radium Engineering fuel hanger plumbing kit• Injector Dynamics ID1700 fuel Injectors• Aeromotive Fuel Systems billet adjustable EFI regulator• Aeromotive Fuel Systems fuel pressure gauge• iWire Wiring Services fuel pump controller hardwire kit• Custom fuel line fabrication utilizing parts from Fragola Performance Systems, Vibrant Performance, and Gates CorporationElectronics:• AEM Performance Electronics 3-port EBCS• COBB Tuning 4 Bar MAP Sensor• AEM Performance Electronics stainless steel IAT sensor kit• iWire Wiring Services Speed Density Wiring Kit• Additional wiring harness components from iWire Wiring ServicesWith the extensive build wrapped up by Dylan in the shop, John strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With the car on the rollers, Vlad increased the EJ257’s output to an absolute killer 658.09awhp & 593.19lbft on flex fuel, and then with 93 octane in the tank, a solid 482.19awhp & 393.20lbft! Some serious performance that Alvaro is sure to enjoy! -

2007 Subaru Impreza WRX STI – Reliability Mods
It’s not that often the older generations receive the much deserved love that the newer generations get. Take in account Brian’s extremely well kept 2007 Subaru Impreza WRX STI. Sitting at just over 100k miles and finished in flawless, all original Urban Gray Metallic paint, this tastefully modified GD Hawkeye has survived the test of time, proving that with the right caretaker, the older generations can look just as good as the newest models.
While this Hawkeye has maintained a fairly stock life so far, reliability modifications are always encouraged, so Brian brought his car to turn it up a hair and to keep things running smoothly for some future track use. Modifications performed by us below:
• COBB Tuning 3-port electronic boost control solenoid
• COBB Tuning AccessPort V3
• GrimmSpeed 3″ FXT downpipe w/ high flow catalytic converter
With the mechanical work wrapped up in the shop by Andrew, Matt strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning Accessport V3. With the stock turbocharger delivering ~19psi, Vlad increased the EJ257’s output to a solid 313.61awhp & 336.05lbft!Reach Out Today To See What We Can Do For You!
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Golden Power: Victor White’s 815whp 2008 Subaru STI
One of the best parts of being in the automotive community and building cars is seeing the different evolutions and phases of builds through the years. Victor White’s Subaru STI is a great example of this.
Victor came to us with his 2008 Subaru STI ready for the next phase of its life, going from a built motor to an insane IAG Tuff Stage 4 Short Block with Stage 5 heads with a big Precision 6870 Turbo.
We were as excited as Victor was for this next phase of his GR STI, so we pulled it in and got to work! First things first, out went the old built motor, ready for it’s next life in a new chassis, and we started getting the bay ready for the new IAG Performance Short Block. Topping off the motor is a Process West intake manifold alongside the massive 6870 Turbo from Precision Turbo and 44m waste gates from TiAL.
As we assembled the block, we couldn’t help but admire how great it looked. There’s something about engine components that strike the eye just right.
Even with as good as it looked, Victor wanted to take the aesthetics to the next level. To match his gold wheels and set off the engine bay, the IAG Fuel Rails and top feed TGV housings were anodized gold.
To fuel this golden powerplant, twin Walbro 450lph fuel pumps were installed and run with a COBB tuning flex fuel kit in order to make the most of the E85 compatibility and potential power gains.
With big power Subaru builds like this, the factory top mounted intercooler just doesn’t get the air needed to keep the engine cool and in proper boost, so we tapped the team at Extreme Turbo Systems for a front mount intercooler kit, powdercoated gold to match the rest of the accent pieces.Sometimes, custom builds require custom work, and that’s where our custom fabricating team comes in handy! Our Performance Technician, Alex, got to work fabricating everything needed to finish up the build, from a custom fabricated coolant reservoir to fuel lines and turbo piping. With Alex’s custom work and some fittings from Vibrant Performance, Fragola Performance, and Radium Engineering, the motor was ready to go!
With the motor buttoned up, turbo piped up, and intercooler mounted in the front, it was time to move on to supporting the boosted bomb under the hood.
To help the transmission handle the boost in power, we installed chromoly billet transfer gears along with a triple disk competition clutch and flywheel from IAG Performance. DSS Axles were also installed to help put the power down to all four wheels.
Keeping the build functional and just as good as stopping as going, the brakes were swapped out for EBS Brakes GD Rotors and Yellow Stuff Pads. Running to each corner are stainless steel brake lines from StopTech.
With the build all set, the only thing left was to get tuning. We strapped the STI on the rollers and let it rip!
After working the COBB Accessport and laying down an impressive 816whp and 669lb/ft of torque on E85, Victor’s STI was reborn into its new phase of life, as an absolute monster!
We love being able to help other enthusiasts make their performance dreams a reality, and Victor’s build was another great example of that! We can’t wait to see what else he has in store for his STI hatch.
Parts List:
- IAG STAGE 4 TUFF EJ25 SUBARU CLOSED DECK SHORT BLOCK FOR WRX, STI, LEGACY GT, FORESTER XT
- IAG Performance Competition Triple Disk Clutch and Flywheel
- IAG Billet Transfer Gears
- Precision Turbo 6870 Turbocharger
- StopTech stainless steel brake lines
- OEM subaru baskets and components
- LFR7AIX Spark Plugs
- ARP 2000 Series Head Studs
- EBC Brakes GD Rotors and Yellow Stuff Pads
- Twin Walbro 450lph fuel pump – E85 compatible
- Gold Anodized IAG cnc top feed tgv housings
- Gold Anodized IAG Fuel Rails
- Gold Anodized Extreme Turbo Systems Front Mount Intercooler
- TiAL 44mm Waste gate valves (black)
- Cobb Flex Fuel kit,ethanol content sensor, fuel pressure sensor kit,
- ATI Performance Super Damper Crank Pulley
- Fragola hoses & PTFE fittings
- Vibrant Performance Aluminum Vbands and fittings.
For a closer look at this build, take a look at the gallery below.
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2014 Subaru WRX STI- IAG Stage 2 EJ257
Jeff brought us his 2014 Subaru WRX STI to have the EJ257 built and taken up a notch! Build setup below:• IAG Performance Stage 2 Tuff EJ257 short block
• ARP 2000 series cylinder head studs
• IAG Performance V2 stainless steel oil pickup
• WRX STI 11mm oil pump
• OEM Subaru oil pan, oil cooler, and associated components
• OEM Subaru timing components
• IAG Performance Street Series air/oil separator
• Garrett – Advancing Motion GT3076R turbocharger
• COBB Tuning turbo blanket
• COBB Tuning black silicone turbo inlet
• COBB Tuning SF air-intake system
• COBB Tuning down-pipe exhaust system
• COBB Tuning exhaust system
• Extreme Turbo Systems front-mount intercooler
• COBB Tuning XLE bypass valve
• Injector Dynamics ID1300x fuel injectors
• AEM Performance Electronics 320lph in-tank fuel pump
• COBB Tuning fuel pressure regulator kit
• NGK Spark Plugs SILFR6A spark plugs
• Advanced Clutch Technology HDSS clutch
• Advanced Clutch Technology Streetlite flywheel
• COBB Tuning 3-port electronic boost control solenoid
• COBB Tuning 4bar MAP sensor
• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installationWith the mechanical work wrapped up by Andrew in the shop, Matt strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased the EJ257’s output to 388.16awhp & 381.15lbft! Solid pump gas performance that Jeff is sure to enjoy!Reach Out Today To See What We Can Do For You!
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2019 Subaru WRX STI – 400awhp
Patrick brought us his 2019 Subaru WRX STI to have the EJ257 built, Flex Fuel enabled, and taken to 400awhp! Build setup below:• IAG Performance Stage 2 Tuff EJ257 short block
• ARP 2000 series cylinder head studs
• IAG Performance V2 stainless steel oil pickup
• WRX STI 11mm oil pump
• IAG Performance Street Series air/oil separator
• AEM Intakes air-intake system
• Invidia Exhaust down-pipe connecting to the existing Gemini R400 exhaust system
• Extreme Turbo Systems top-mount intercooler
• Injector Dynamics ID1050x fuel injectors
• Blouch Turbo 20G-XT turbocharger
• NGK Spark Plugs LFR7AIX spark plugs
• Advanced Clutch Technology XTSS clutch
• Advanced Clutch Technology Streetlite flywheel
• COBB Tuning 3-port electronic boost control solenoid
• COBB Tuning Flex Fuel conversion
• All the miscellaneous OEM Subaru gaskets, seals, and components to complete the installationWith the mechanical work wrapped up by Dylan in the shop, John strapped her down to the rollers for Vlad to perform a custom calibration via COBB Tuning‘s Accessport V3. With 93 octane in the tank, Vlad increased the EJ257’s output to 385.32awhp & 358.11lbft, and after switching to E85, output jumped to 403.24awhp & 410.14lbft! Nice square setup with usable power all over the rev range!Reach Out Today To See What We Can Do For You!



























































































































