STI (gen 2) Archives

We previously had gotten an IAG Performance big throttle body for Project STI, although it was a nice piece it was not exactly user-friendly. You had to get the drive-by-wire…

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Project GD STI, Out with the Old and in with the New!

Posted on August 2, 2022August 3, 2022
byMike Kojima

It is time for us to swap out our damaged EJ257 and install our IAG 700 engine. We spent a lot of time waiting on parts to finish the job,…

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WATCH: Subaru Engine Swap Must Have Parts!

Posted on May 20, 2022
byJeff Naeyaert

If you’re building a high performance Subaru engine there’s a lot of parts and accessories to consider buying or upgrading while you’re in there. In this video Mike explains…

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Nightmotorsport Air Oil Separating Billet Valve Covers for Subaru EJ Engines

Posted on April 26, 2022April 28, 2022
byMike Kojima

Subarus like all flat engines, blow a lot of oil out of the crankcase in their blowby gasses. This is always a problem with performance flat engines like Porsche or…

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Freeing up the EJ257 Intake Flow with Process West and IAG

Posted on April 24, 2022
byMike Kojima

We were planning to run a Cosworth intake manifold on Project STI’s IAG motor but we were unable to find one for a decent price as they have been discontinued…

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Cutting Big Weight From Project STI With AntiGravity Batteries and MeleDesign Firm

Posted on April 17, 2022
byMike Kojima

While we are going through Project GD STI, repowering it and upgrading many of its systems, we thought it would be nice to replace the car’s heavy AGM battery with…

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Project GD STI, Getting Ready For the Engine Swap

Posted on January 30, 2022
byMike Kojima

In our previous articles, we covered the build-up of our EJ257 engine collaboration with IAG Performance. Now we have been collecting a bunch of parts to make our installation go…

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Project GD STI, IAG’s new high capacity EJ Oil Pump!

Posted on November 28, 2021
byMike Kojima

IAG has just dropped their Stage 1 and Stage 2 oil pumps for all EJ engines. We will be using their Stage 2 pump on our own Project GD STI.…

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WATCH: How to Solve Your Subaru Fueling Problems. The Right Way!

Posted on November 19, 2021
byJeff Naeyaert

In this video Mike explains the shortcomings of the stock Subaru fuel system and how to fix it the right way. This fuel system is capable of supporting up…

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WATCH: Fix Subaru Oiling Issues for Good!

Posted on October 22, 2021
byJeff Naeyaert

In this video Mike talks about yet another shortcoming of the Subaru EJ engine and probably the best way to fix it! If you liked the video, please subscribe…

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Solving Subaru EJ Oiling Issues for Good with IAG Performance!

Posted on October 19, 2021
byMike Kojima

Subaru EJ engines are known to have oiling problems caused by the oil pan and pick up. We personally know quite a few people who have lost engines on the…

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WATCH: The Best Clutch Money Can Buy? XClutch Twin Disc

Posted on October 9, 2021
byJeff Naeyaert

We recently noticed a new clutch brand to us that’s been gaining popularity in the time attack crowd. In this video Mike takes a look at the XClutch twin…

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Project GD Subaru STI, High Power Fuel System Upgrades!

Posted on October 3, 2021
byMike Kojima

When last tuning our STI with Cobb’s flex-fuel system, we had maxed out our Mass Air Flow Meter, fuel pump and had our injectors going at the maximum duty cycle…

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Project GD Subaru STI, Checking out the Ultimate Streetable Clutch with XClutch.

Posted on July 18, 2021July 29, 2021
byMike Kojima

With our killer engine by IAG now sitting in our shop, it was time to start gathering the peripheral components needed to support our new motor. The next thing absolutely…

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Project GD Subaru STI, Building the Engine Part Five: Final Engine Assembly With IAG.

Posted on June 20, 2021
byMike Kojima

In our last story, you saw how IAG Performance assembled our short block with meticulous care. Now our engine travels to the second of IAG’s two cleanrooms for final assembly.…

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Project GD Subaru STI, Building the Engine Part Four: Assembling the Short Block With IAG.

Posted on June 13, 2021
byMike Kojima

If you have been following our EJ257 engine build series with IAG Performance, you have been able to look inside IAG’s incredible attention to detail in machining and parts selection. …

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Project GD Subaru STI: Building the Engine Part Three, Cylinder Head Technology With IAG Performance.

Posted on May 23, 2021June 9, 2021
byMike Kojima

The cylinder head is one of the most important parts when it comes to making power in an engine. Although headwork is less critical in a turbo engine than a…

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Project GD Subaru STI: Building the Engine Part Two, Bottom End Bits With IAG Performance.

Posted on May 2, 2021June 9, 2021
byMike Kojima

In part one of our series of building the motor for Project GD STI we talked about the IAG Performance engine cases we are using and all of the prep…

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Project GD Subaru STI, Building the Engine Part One, Prepping the Case With IAG Performance.

Posted on April 13, 2021June 9, 2021
byMike Kojima

It had to happen eventually. Our Project STI was running great. We had plans to build the engine as our 400 whp was past the limit that a stock bottom…

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Project Subaru GD STI, Improving The Ignition System!

Posted on September 19, 2019September 24, 2019
byMike Kojima

Nowadays it is hard to improve the ignition on late model cars. New car ignitions, especially ones with coil on plug systems are more powerful from the factory than racing…

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The Dreaded Subaru p0011 and p0021 DTC Codes, Don’t Let Them Wreck Your Turbo!

Posted on August 29, 2019December 4, 2019
byMike Kojima

So DO NOT do what we did when our Project GD STI turned on a p0011 OBD DTC code. What we figured was some sort of sensor issue ended up…

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Comparing the Falken RT615 to the RT615K Plus!

Posted on January 22, 2019January 23, 2019
byMike Kojima

The Falken RT615 has always been a good all-around Ultra High Performance dry weather tire with decent durability. Good enough to be daily driven and good enough for the track. The…

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A Fake Stereo Cover For Your Stereo

Posted on September 14, 2018October 9, 2018
byMike Kojima

While we typically focus on performance products, many of us daily drive our cars and enjoy the everyday essentials like your stereo. Like most essential enhancements, we’ve upgraded our Project Subaru WRX STI stock radio to a Pioneer 7-inch double din display. And with any nice stereo comes with the anxiety of getting your car broken into for stereo theft.

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Project GD STI: Making the Front of the Car Stiffer with Ultra Racing

Posted on August 29, 2017July 2, 2018
byMike Kojima

Project GD STI: Making the Front of the Car Stiffer with Ultra Racing by Mike Kojima In the last installment of Project STI, we had greatly increased the chassis…

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Project GD STI: Getting Rid of Chassis Flex with Cusco

Posted on August 25, 2017July 2, 2018
byMike Kojima

Project GD STI: Getting Rid of Chassis Flex with Cusco by Mike Kojima The GD STI/WRX had what was considered to be a very stiff chassis when it was first…

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Project GD STI: Making More Power with Cobb Tuning and Precision Turbo Part 2!

Posted on July 31, 2017July 2, 2018
byMike Kojima

Project GD STI: Making More Power with Cobb Tuning and Precision Turbo Part 2! by Mike Kojima When we last left off with Project GD STI, we had just…

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Testing Radium Engineering’s Advanced Self-Draining Catch Can!

Posted on April 5, 2017July 2, 2018
byMike Kojima

Testing Radium Engineering's Advanced Self-Draining Catch Can! by Mike Kojima Having proper crankcase ventilation is critical on a performance engine, especially forced induction ones that have more blowby past the rings…

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Project GD STI: Getting More Power with Precision Turbo and Cobb Tuning! – Part 1

Posted on December 1, 2015July 2, 2018
byMike Kojima

Project GD STI: Getting More Power with Precision Turbo and Cobb Tuning! – Part 1 by Mike Kojima Our STI has been driving around as a daily for two years…

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Project GD STI – Checking Out The Development of KW’s New 3-Way Adjustable Clubsport Coilovers

Posted on March 5, 2013July 3, 2018
byMike Kojima

Project GD STI- Checking Out The Development of KW's New 3-Way Adjustable Clubsport Coilovers By Mike Kojima A few months ago we visited KW Suspensions' factory in Germany to…

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Project GD STI – Improving the Fuel System with Injector Dynamics and Other Details

Posted on December 9, 2012May 20, 2019
byMike Kojima

Project GD STI – Improving the Fuel System with Injector Dynamics and Other Details By Mike Kojima When we had last left off on Project STI’s engine, we had just…

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Project GD STI- Getting it Slowed Down with Stoptech

Posted on October 29, 2012July 3, 2018
byMike Kojima

Project GD STI- Getting it Slowed Down with Stoptech By Mike Kojima The Subaru GD STI comes with pretty good brakes from the factory, big Brembo 4 piston front and…

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Project GD STI- Keeping Cool with Greddy and Koyo!

Posted on October 1, 2012July 3, 2018
byMike Kojima

Project GD STI- Keeping Cool with Greddy, Cobb and Koyo! By Mike Kojima At this stage in the modding of Project STI's engine, it is time for us to lay…