Performance Top-Mount Intercooler Kit, fits Subaru WRX STI 2008-2021
Performance Top-Mount Intercooler Kit, fits Subaru WRX STI 2008-2021
MISHI POINTS INFO
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- Direct fit for the 2008-2021 Subaru WRX STI
- Provides 10 F temperature drop compared to stock intercooler
- Proven 5 whp and 7 wtq bolt-on power increase for stock vehicle
- 3.75-in thick core with 584 in3 of volume produces optimal heat transfer for vehicles from stock to 400 whp
- 100-percent aluminum construction with durable cast end tanks
- TIG-welded to a highly efficient bar-and-plate core
- Easily installs in under 30 minutes
- Does not require modification to the stock A/C line and functions with the stock intercooler Y-pipe
- Includes new Y-pipe gaskets, BPV gasket, silicone PCV hose, and silicone throttle-body coupler
- Available in durable powder-coated Stealth Black or Sleek Silver finish
- Mishimoto Lifetime Warranty
Installation Difficulty: Medium
CARB EO#: D-759 - Direct fit for the 2008-2021 Subaru WRX STI
- Provides 10 F temperature drop compared to stock intercooler
- Proven 5 whp and 7 wtq bolt-on power increase for stock vehicle
- 3.75-in thick core with 584 in3 of volume produces optimal heat transfer for vehicles from stock to 400 whp
- 100-percent aluminum construction with durable cast end tanks
- TIG-welded to a highly efficient bar-and-plate core
- Easily installs in under 30 minutes
- Does not require modification to the stock A/C line and functions with the stock intercooler Y-pipe
- Includes new Y-pipe gaskets, BPV gasket, silicone PCV hose, and silicone throttle-body coupler
- Available in durable powder-coated Stealth Black or Sleek Silver finish
- Mishimoto Lifetime Warranty
Product Description
This STI intercooler endured rigorous testing, showing a 10°F temperature drop as well as a +5 whp and +7 wtq bolt-on power increase for our stock test vehicle. Installation of this top-mount intercooler is simple, requires no modification to the stock A/C line, and can be completed in under 30 minutes. Included with this top-mount intercooler are new Y-pipe gaskets, a new BPV gasket, a silicone PCV hose, and a silicone throttle body coupler. These components negate the need to gather supplies for installation, and they ensure years of reliable service. This top-mount intercooler is available in a durable powder-coated finish of Stealth Black or Sleek Silver and like all of our WRX performance parts, it includes the Mishimoto Lifetime Warranty.
TECH SPECS
| Applications | 2008-2021 Subaru WRX STI |
|---|---|
| Engine Codes | EJ257 EJ255 |
| Chassis Codes | GR GV |
| Note | This kit is rated for 250-450 whp with maximum limits of approximately 500 whp, or 30 PSI of turbo boost. Exceeding that horsepower or pressure limit may require a larger front-mount intercooler. |
| Overall Length (in) | 24.5 |
| Overall Height (in) | 11.5 |
| Overall Width (in) | 4.25 |
| Core Type | Bar-and-Plate |
| Core Thickness (in) | 3.75 |
| Core Length (in) | 21 |
| Core Height (in) | 7.25 |
Compatible Vehicles
Installation Guides
Downloads
Purchase Includes
(1) Intercooler to Throttle Body Transition Coupler
(1) PCV Hose
(1) Bypass Valve Gasket
(2) Y-pipe to Intercooler Gaskets
(1) Black Nylon Hose Fitting, 3/4-in I.D.
(1) Black Nylon Tee Hose Fitting, 3/4-in I.D.
Note:
Interested in purchasing our STI intercooler? Check out our product page for more information!
Mishmoto Subaru WRX STi Performance Top-Mount Intercooler Kit
Testing day! After a long ride through development and design, it was finally time to see the fruits of our labor. Before strapping the STI to the dynamometer, we needed to prepare the coolers for testing. This included drilling and tapping the coolers for our temperature and pressure sensors at both the inlet tank and outlet tank.
Check out a few preparation shots of our stock cooler!
Interested in purchasing our STI intercooler? Check out our product page for more information!
Mishmoto Subaru WRX STi Performance Top-Mount Intercooler Kit
So just how much better is the Mishimoto top-mount intercooler (TMIC) compared to the stock unit? Well " only our testing will confirm this. Physically we can already see several improvements. Let's compare the core size in a simple chart.
Comparison of core thickness in stock intercooler (left) and Mishimoto TMIC prototype
A look at the bottom of both intercoolers reveals quite a few differences.
Interested in purchasing our STI intercooler? Check out our product page for more information!
Mishmoto Subaru WRX STi Performance Top-Mount Intercooler Kit
The wait is over! Time to reveal the full details of our prototype top-mount intercooler (TMIC). This unit is unpainted, and one of the more obvious features is its massive size! First, a few overview images of this cooler.
Mishimoto raw aluminum TMIC prototype
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Interested in purchasing our STI intercooler? Check out our product page for more information!
Mishmoto Subaru WRX STi Performance Top-Mount Intercooler Kit
Did you think we would just develop a top-mount intercooler (TMIC) for the GD WRX and leave out the STI? No way! At around the same time we began development on the WRX, we picked up a new shop vehicle, a 2010 STI. When a new vehicle makes its way into shop service, we need to be sure it accelerates and handles properly. The STI passed our checkup. We then set out to determine what products we wanted to develop first. We already had a few items on the market, including a performance aluminum radiator and a silicone radiator hose kit. Our first target had been a direct-fit oil cooler that proved to be extremely successful, providing a 20°F drop in oil temperatures during our testing. Next we created a plug-n-play fan shroud with dual 12" electric
Frequently Asked Questions
