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  1. Mishimoto 2015+ Subaru STi Performance Cold-Air Intake System, Part 4: Race Intake System

    Mishimoto 2015+ Subaru STi Performance Cold-Air Intake System, Part 4: Race Intake System

    Interested in purchasing our 2015 STi intake system? Check out more details on our product page linked below!

    Mishimoto Subaru STI Performance Air Intake

    As noted earlier in this article series, we would be tackling a race intake system to go along with our bolt-on unit. So what makes the race system different? For this particular system we are using a larger-diameter intake pipe with a larger MAF housing. This means greater intake flow, but it also means it will no longer function with the factory tune. This system is meant specifically for drivers who want aggressive professional tunes so they can take advantage of airflow modifications such as larger turbochargers and high boost pressures.

    Because the 15' model shares the EJ from the previous generation, we would be using the same intake pipe and filter as we did with our 2008-2014 kit. This unit is shown below.

    So, all we truly needed

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  2. Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 3: Testing

    Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 3: Testing

    Interested in purchasing our 2015 STi intake system? Check out more details on our product page linked below!

    Mishimoto Subaru STI Performance Air Intake

    Dyno Testing

    Time to see what kind of power gains we are able to achieve with our intake design! First, we strapped this Launch Edition to the dynamometer.

    2015 STI on the dynamometer
    2015 STI on the dynamometer

    2015 STI on the dyno
    2015 STI on the dyno

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  3. Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 2: Prototype Fabrication

    Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 2: Prototype Fabrication

    Interested in purchasing our 2015 STi intake system? Check out more details on our product page linked below!

    Mishimoto Subaru STI Performance Air Intake

    Prototype Fabrication

    After experimenting with some boxed designs in Part 1 of this write-up, it was time to turn our attention to a shrouded setup, similar to what we offer for the 2008-2014 models. We're hoping we could utilize the piping from our existing kit, which is well designed and has proven power gains. After placing the shroud into position, we found that it would certainly fit, but would require some modification. The fabrication work began! Check out a few shots taken during the process.

    Mishimoto intake shroud modification</body> " width="300" height="200">
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  4. Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 1: Project Introduction and Goals

    Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 1: Project Introduction and Goals

    Interested in purchasing our 2015 STi intake system? Check out more details on our product page linked below!

    Mishimoto Subaru STI Performance Air Intake

    Launch Edition Subaru STI in Mishimoto garage
    Launch Edition Subaru STI in Mishimoto garage

    Introduction

    Our team is finally working on some cool components for the new 2015 Subaru STI! As you know, the 2015 STI is essentially a hybrid of old and new Impreza components. It features the newer body style paired with the trusty EJ engine, instead of the new DIT motor featured in the WRX. We won't get into which is better or which we prefer, because we have nothing but praise for the updated chassis.

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  5. Mishimoto Subaru WRX/STi FMIC Kit, Part 8: Testing Data Presentation and Project Recap

    Mishimoto Subaru WRX/STi FMIC Kit, Part 8: Testing Data Presentation and Project Recap

    Interested in purchasing our Subaru WRX or STi intercooler kit? Check out more details on our product pages linked below!

    Mishimoto Subaru WRX/STi Front-Mount Intercooler, 2001-2007

    Mishimoto Subaru WRX Front-Mount Intercooler, 2008-2014

    Mishimoto Subaru STi Front-Mount Intercooler, 2008-2014

    Time to review our data so we can finally put a close on this project. The product development process for this front-mount intercooler has taken months and has also helped refine several of our processes. Before we move into the testing data, our first portion of this post will cover the physical benefits of our intercooler. By providing a more efficient heat exchanger, we can ensure that higher-powered vehicles are not being hindered by debilitating heat-soak

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  6. Mishimoto Subaru WRX/STI FMIC Kit, Part 7: Cooler Efficiency Testing

    Mishimoto Subaru WRX/STI FMIC Kit, Part 7: Cooler Efficiency Testing

    Interested in purchasing our Subaru WRX or STi intercooler kit? Check out more details on our product pages linked below!

    Mishimoto Subaru WRX/STi Front-Mount Intercooler, 2001-2007

    Mishimoto Subaru WRX Front-Mount Intercooler, 2008-2014

    Mishimoto Subaru STi Front-Mount Intercooler, 2008-2014

    We are nearing the end of this build. As mentioned in the last post, we wanted to put our core to the test and provide some cooling efficiency data that our customers could use. We decided to modify our 2010 STi to add some heat and power to the CAC system for testing. Information regarding our vehicle is listed below.

    2010 Subaru WRX STI

    • 6-Speed Manual
    • Mishimoto Intake
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  7. Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 6: Final Prototype Installation Shots

    Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 6: Final Prototype Installation Shots

    Interested in purchasing our Subaru WRX or STi intercooler kit? Check out more details on our product pages linked below!

    Mishimoto Subaru WRX/STi Front-Mount Intercooler, 2001-2007

    Mishimoto Subaru WRX Front-Mount Intercooler, 2008-2014

    Mishimoto Subaru STi Front-Mount Intercooler, 2008-2014

    As promised, we have a couple cool images showing these kits fully installed on our test vehicles. Check them out below!

    First, our full kit installed on our shop 2003 WRX Bugeye wagon!

    Bugeye wagon with Mishimoto kit fully installed
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  8. Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 5: Intercooler Pipe Fabrication/Development Continued

    Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 5: Intercooler Pipe Fabrication/Development Continued

    Interested in purchasing our Subaru WRX or STi intercooler kit? Check out more details on our product pages linked below!

    Mishimoto Subaru WRX/STi Front-Mount Intercooler, 2001-2007

    Mishimoto Subaru WRX Front-Mount Intercooler, 2008-2014

    Mishimoto Subaru STi Front-Mount Intercooler, 2008-2014

    GR STI stock intercooler removed
    GR STI stock intercooler removed

    Once the engine bay was evaluated, we began to fabricate piping. Our goal was to route these pipes in the cleanest possible fashion while keeping the route as short as possible. First, the upper portion

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  9. Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 4: Intercooler Pipe Fabrication/Development

    Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 4: Intercooler Pipe Fabrication/Development

    Interested in purchasing our Subaru WRX or STi intercooler kit? Check out more details on our product pages linked below!

    Mishimoto Subaru WRX/STi Front-Mount Intercooler, 2001-2007

    Mishimoto Subaru WRX Front-Mount Intercooler, 2008-2014

    Mishimoto Subaru STi Front-Mount Intercooler, 2008-2014

    Time to weld up some pipes! This would be the more time-consuming portion of this project, as most of these vehicles would require a specific pipe kit. We would not be able to utilize one set of pipes across the model board, as we did with the intercooler. Going in order, we started with our Bugeye. One of our test vehicles featured a reasonably stock engine bay, as shown below.

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  10. Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 3: Intercooler Prototype Introduction and Test Fitting

    Mishimoto Subaru WRX/STi Front-Mount Intercooler Kit, Part 3: Intercooler Prototype Introduction and Test Fitting

    Interested in purchasing our Subaru WRX or STi intercooler kit? Check out more details on our product pages linked below!

    Mishimoto Subaru WRX/STi Front-Mount Intercooler, 2001-2007

    Mishimoto Subaru WRX Front-Mount Intercooler, 2008-2014

    Mishimoto Subaru STi Front-Mount Intercooler, 2008-2014

    Time to take a quick look at our cooler and see how it fits with our test vehicles. First, a quick overview of the cooler itself. Check out our first prototype!

    Mishimoto prototype intercooler
    Mishimoto prototype intercooler
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