712450 - COBB Subaru Silicone Turbo Inlet Install

Owned by Brandyn Mowat
Last updated: Apr 18, 2023

 

712450-BK – COBB Silicone Turbo Inlet

Subaru WRX STI 2008 - 2021

Subaru Forester XT 2004 - 2008



Congratulations on your purchase of the COBB Tuning Subaru Silicone Turbo Inlet! The following instructions will assist you through the installation process. Please read them BEFORE beginning the install to familiarize yourself with the steps and tools needed. If you feel you cannot properly perform this installation, we HIGHLY recommend you take the vehicle to a qualified and experienced automotive technician

IMPORTANT! Installing this kit will require custom tuning or utilizing an appropriate Stage Power Package map if you have a matching mechanical configuration. Please consult with COBB or an authorized ProTuner in your area.


Parts List

Tools Needed




Quick Reference:




WRX & WRX STI TMIC Removal

These instructions work for the following models
  • WRX 2002 - 2007
  • WRX STI 2004 - 2020
  • Forester XT 2004 - 2008
  1. Locate your stock bypass valve.


               
  2. Using a pair of pliers, remove the return line from the bypass valve.



  3. Remove the vacuum line from the factory bypass valve.




  4. Using a 12mm socket with ratchet, remove the 2 bolts that hold the bypass valve in place and remove it from the car.

    TIP: Make sure to keep an eye on the factory gasket behind the BPV.  It can fall when you remove the valve and end up in difficult to reach locations!





  5. Remove the bypass valve.

  6. Remove breather tubes from intercooler. Dikes can be helpful when removing the metal clamps or zip ties.



  7. Loosen the turbo outlet clamp using a screwdriver or appropriately sized socket (Typically 7-8mm) along with the (2) throttle body clamps using a screwdriver or 8mm socket.




  8. Remove the two bolts holding the intercooler in place

        


  9. Gently wiggle TMIC free from engine bay by sliding it back and then out. Be careful to not damage your windshield wiper cowl.



WRX/STI EJ Stock Intake Removal
  1. Remove the (2) plastic retainers that hold down the intake snorkel using a flat head screwdriver.

           


  2. Remove the intake snorkel from the engine bay.




  3. Remove the (2) Phillips head screws holding down the MAF sensor using a Phillips head screwdriver.

             


  4. Gently remove the MAF sensor and unclip the MAF sensor harness then set the sensor somewhere safe.

       


  5. Release the vacuum hoses from the clips on the intake elbow.

       


  6. Loosen the (2) hose clamps on the intake elbow.




  7. Remove the 10mm bolt that holds the bottom of the airbox to the chassis using a 10mm socket and 6" extension.

       


  8. Remove the 10mm nut holding the airbox to the airbox bracket.

       


  9. Gently lift and remove the airbox, being cautious of the other vacuum hoses in the engine bay.

          



While not necessary removing the intake manifold can make the installation easier in some ways particularly if you are doing the work at the same time you plan on installing fuel system upgrades.  Removing the intake manifold streamlines the install of fuel injectors, rails and lines.  For more information on how to do so check out our guide Subaru WRX & STI Intake Manifold Removal (EJ)




Inlet Hose Removal

  1. Remove the EBCS line from the front port of the turbo inlet