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Product ID: MM-TMIC-STI-08
Manufacturer: Mishimoto
Mishimoto Subaru 08-15 WRX STi Top-Mount Intercooler Kit
Mishimoto Subaru 08-15 WRX STi Top-Mount Intercooler Kit
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Looking for a way to reduce high intake temperatures on your stock or modified STI? The solution is the Mishimoto direct-fit top-mount intercooler engineered specifically for the 2008–2015 Subaru WRX STI. Mishimoto engineers spent months designing and testing this new STI TMIC to ensure optimum performance on both the street and track. This STI intercooler utilizes durable cast aluminum end tanks TIG-welded to a highly efficient, dense bar-and-plate core. The Mishimoto intercooler has a 3.75" thick core and a total volume of 584 in3. Thanks to this volume and a very dense offset fin pitch, we are able to optimize heat transfer and support vehicles from stock up to 400 whp. 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.

        • Direct fit for the 2008–2015 Subaru WRX STI
        • Available in durable powder-coated Stealth Black or Sleek Silver finish
        • Mishimoto Lifetime Warranty
        • CARB EO #: D-759
        • Provides 10°F temperature drop compared to stock intercooler
        • Proven +5 whp and +7 wtq bolt-on power increase for stock vehicle
        • 3.75" thick core with 584 in3 of volume produces optimal heat transfer for vehicles from stock to 400 whp
        • 100% 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


Silicone Couplers(1) Intercooler to Throttle-Body Transition Coupler

Purchase Includes(1) Top-Mount Intercooler
(1) Intercooler to Throttle-Body Hose
(1) Turbo to Intercooler O-Ring Gasket

NoteThis kit is rated for 250-350 whp with maximum limits of approximately 400 whp, or 30 psi of turbo boost. Exceeding that horsepower or pressure limit may require a larger front-mount intercooler.

Core Thickness3.75"

PCV Hose Specs17.5" length
0.45" I.D.
0.75" O.D.
4mm thick

Intercooler/Throttle Body Coupler Specs2.125" length
2.75" I.D.
3.00" O.D.
4mm thick

Engine CodesEJ255

Chassis CodesGR

Fits2008-2014 Subaru WRX 
2005-2009 Legacy GT
2005-2009 Outback XT
2009-2013 Forester XT

Weight21 lbs

Tank Wall Thickness3.5mm

Fin PitchInternal: 4.7mm fin height, 2.8mm fin pitch
External: 6.5mm fin height, 1.7mm fin pitch

Max Rec. PSI30 psi


Core Length11"

Core Height11"

Core Width3.5"


Core Size11" x 11" x 3.5"

Overall Width5"

Overall Height12.5"

Overall Length18.5"


Max Rec. HP400 whp




List Price: $837.50
Price: $600.00

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