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 top-mount intercooler to ensure optimum performance on both the street and track.
This top-mount 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 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.
|COOLER OVERALL SIZE|
24.5" x 11.5" x 4.25"
COOLER CORE SIZE
21" x 7.25" x 3.75"
Bar-and-plate with cast end tanks
TANK WALL THICKNESS
COOLER INLET / OUTLET
Inlet: 2.5" x 1.313" (x2)
Outlet: 2.56" I.D. / 3.00" O.D.
COOLER FIN SPECS
Internal: 4.7mm fin height, 2.8mm fin pitch
External: 6.5mm fin height, 1.7mm fin pitch
INTERCOOLER TO THROTTLE-BODY COUPLER HOSE SPECS
PCV HOSE SPECS
08–15 Subaru WRX STI
(1) Bar-and-Plate Intercooler
(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" I.D.
(1) Black Nylon Tee Hose Fitting, 3/4" I.D.
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.
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