712400-BK – COBB Silicone Turbo Inlet
GR/VA STI



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.

NOTE: This methodology of installing a turbo inlet hose is more involved, as we remove the intake manifold. However, due to our turbo inlet hose being packaged with fuel system upgrades, removing the intake manifold streamlines the install of fuel injectors, and thus, we prefer this approach.

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

  • Silicone Turbo Inlet
  • 23" PCV Hose

Tools Needed

  • Phillips head screwdriver
  • Flathead screwdriver

  • 3/8" ratchet

  • 1/4" ratchet

  • 1/4" 6" swivel ratchet

  • 1/4" 10mm socket

  • 1/4" 6" extension

  • 3/8" 10mm socket

  • 3/8" 12mm socket

  • 12mm box end wrench

  • 6mm hex key





Inlet Hose Installation

  1. Remove the OEM turbo inlet hose.
     
  2. Line up the COBB silicone inlet hose.  Measure it for fit as it is slightly longer to accomodate a variety of turbochargers.  You'll likely want to trim it as straight as possible using a razor blade or appropriate hose cutter.  It's also suggested to cut it in small increments to avoid making it too short.

       


  3. Proceed in the reverse order to re-install your intake manifold and intake system.
     
  4. Refill your coolant to the appropriate level and follow the proper purging process to rid of any air in the system.
     
  5. We recommend conducting a pressurized smoke test to verify you have no leaks once everything is buttoned up.

  6. Done!



Turbo Inlet Vacuum Hose Placement Quick Reference Guide

STI Turbo Inlet Hose Placement









Links

COBB Product Install Instructions for Subaru Vehicles 

Main Installation Instruction Repository for Subaru Parts



Calibration Map Notes for Subaru Vehicles

Link to Subaru Map Notes to see what map you should be on given the parts you've added