Page 4 - subaru

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

Interested in picking up our 2015 WRX FMIC kit? Check out more details on our product page linked below!

Mishimoto Subaru WRX Front-Mount Intercooler Kit

Crash Beam Fabrication

After an unsuccessful test fit of our existing bumper beam on the 15', we started from scratch to create a beam specific for the 15' chassis. First we hacked off the end tanks of our cooler so we were left with a bare core. This would provide some freedom to design our crash beam and later work on the end tank direction. Next we cut out some new mounting plates and fit them into position.

Intercooler

Interested in purchasing our WRX or STi catch can system? Check out more details on our product pages linked below!

Subaru WRX Baffled Oil Catch Can System

Subaru STi Baffled Oil Catch Can System

Mishimoto 2010 STI

After developing a highly successful, direct-fit catch can setup for the 2015 WRX we turned our attention to the previous generation. Our next target would be the 2008-2014 WRX and STI. At this point, Mishimoto still owned a 2010 STI, and this project would be our last for our shop vehicle.

Catch Can Selection

As with our 2015 WRX

Interested in purchasing our 2015 WRX cat-back exhaust? Check out more details on our product page linked below!

Subaru WRX/STi Cat-Back Exhaust

As promised, we hit the road to begin testing our prototype designs. Our first round of testing was purely to evaluate the tone and sound level of the exhaust.

What are we looking for?

• Rich tone
• Little to no rasp
• Minimal highway drone
• Noise amplification from one-half to full throttle

As you know, the FA20 utilizes an equal-length header, which means that the traditional Subaru rumble is likely to be lost. Either way, we would be looking for a nice tone that would be acceptable for daily use.

Our first road test utilized our smaller, round style muffler.

Interested in purchasing our 2015 WRX top-mount intercooler kit? Check out more details on our product page linked below!

Mishimoto Subaru WRX Performance Top-Mount Intercooler and Charge-Pipe System

We've shared a ton of teasers that show our awesome charge-pipe design for the 2015 WRX. Now it is time to show you how this component came to life.

First, take a look at the factory-equipped charge pipe.

Stock 15' WRX charge pipe

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Interested in picking up our 2015 WRX FMIC kit? Check out more details on our product page linked below!

Mishimoto Subaru WRX Front-Mount Intercooler Kit

15' WRX testing

Already outgrowing the efficiency of your 15' WRX top-mount intercooler setup? Planning for some big power in the near future? Sounds like your Subie needs an efficient front-mount intercooler (FMIC)! Luckily, our team has been working to develop this product for months. Check out the process below!

Intercooler Design

Our team decided to start this product with the design

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 dyno

Interested in purchasing our 2015 WRX top-mount intercooler kit? Check out more details on our product page linked below!

Mishimoto Subaru WRX Performance Top-Mount Intercooler and Charge-Pipe System

Size Comparison

Before installing our prototype cooler on one of our 2015 WRXs, we decided to take a few shots showing the huge size difference of our cooler compared to the stock unit.

Mishimoto prototype intercooler (left) and stock intercooler (right)

Interested in purchasing our 2015 WRX cat-back exhaust? Check out more details on our product page linked below!

Subaru WRX/STi Cat-Back Exhaust

Prototype Fabrication

With the front section of our exhaust complete, we needed to address the Y-section as well as the pipes routing to the mufflers. We decided to go with 2 1/4" piping following the Y-section, which matches the diameter of the STi system.

Check out a couple shots from the fabrication process.

Fabricated muffler section

We bent a few more hangers for attaching the mufflers to the appropriate stock locations.