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2004 Subaru WRX - Keeping Under Pressure Cool - Tech Knowledge

What To Expect From Upgrading Your WRX's Intercooler

  • 2004 Subaru Wrx Radiator Overflow
  • 2004 Subaru Wrx Radiator Overflow Installed
    Depending on your year/model car, you may have to replace your stock radiator overflow reservoir with Perrin's included unit. Assemble it as shown here and follow the included mounting directions for your particular make/model WRX, or do what we did, and just make it up as you go.
    2004 Subaru Wrx Radiator Overflow Installed
    Depending on your year/model car, you may have to replace your stock radiator overflow res
  • 2004 Subaru Wrx Intake
  • 2004 Subaru Wrx Intake Installed
    If you were using the WRX's stock airbox previously, you'll need to upgrade it to the Perrin intake to accommodate the new intercooler plumbing.
    2004 Subaru Wrx Intake Installed
    If you were using the WRX's stock airbox previously, you'll need to upgrade it to the Perr
  • 2004 Subaru Wrx Mounted Right Side
  • 2004 Subaru Wrx Lower Tubing
    Bolt up the lower tubing. And you're almost finished! Before you bolt back on your front bumper cover, you'll need to trim it a little to clear the new Perrin FMIC and plumbing. Here is the only tricky part of the install. Check out our pics of Mark's bumper after modification to get an idea of how yours should look, and use an air grinder or Dremel to do the job and Trim little by little, using tape to mark straight lines. test-fit the bumper as you go, then straighten out the intercooler and tighten it down. This part takes some time, so be sure not to rush yourself for best results.
    2004 Subaru Wrx Lower Tubing
    Bolt up the lower tubing. And you're almost finished! Before you bolt back on your front b
  • 2004 Subaru Wrx Fog Light Cover
  • 2004 Subaru Wrx Bumper
  • 2004 Subaru Wrx Blue Tape
2004 Subaru Wrx Dyno
INTAKE TEMPERATURE (F) PERRIN STOCK
109 121
COOLANT TEMPERATURE (F) 210 216
AVERAGE BOOST 12.1 12.1
MAXIMUM HORSEPOWER 204.6 202.8
MAXIMUM TORQUE 206.7 194.8
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