422600 - STI Redline Carbon Alternator Cover

422600 – STI Redline Carbon Alternator Cover

Subaru WRX STI 2008 - 2021

Congratulations on your purchase of the COBB Tuning STI Carbon Alternator Cover! 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.

Table of Contents

Parts List

  • Carbon Alternator Cover
  • M4 Hex Key
  • Alternator Cover Mounting Bracket
  • (2) M6x10mm SS Black Oxide Button Head Bolts
  • Bushing Pin
  • (2) Plastic Spacer Collar
  • Blister Pack of Loctite 242 (Blue)

Tools Needed



Stock Cover Removal

  1. Remove the single 10mm bolt holding the cover onto the bracket

  2. Reaching underneath, gently squeeze the tabs on the plastic pin on the right hand side holding it into the bracket.  It should now lift free.

  3. Looking through the power steering pump pulley you should see a single 10mm bolt holding the factory cover bracket in place.  You may need to turn the pulley using a 19mm wrench (slowly and carefully)


  4. With the hole lined up slowly remove the bolt and bracket.  Having a magnet right next to it will be helpful to avoid the bolt flinging itself into the depths of the engine bay.

  5. Once it's removed, take off the factory bracket.  Apply a small dab of the supplied loctite to the factory bolt, and then screw it in a few turns by hand.

  6. The new bracket should slip in behind the head of the bolt.  You'll want the bracket on top to have the threaded portion facing towards the alternator.

  7. Using your fingers, install the provided plastic collars into the screw holes with the thicker side to the outside (Pretty/Glossy side of the carbon fiber).


  8. Using a 4mm socket, install the short allen bolt along with a small dab of blue loctinte on the right hand side of the cover (closest to the emblem) and screw it into the supplied pin.  Tighten it down with a 14mm socket.


  9. Pop the pin on the cover into the location with the grommet.  You can now move around the bracket on the other side to match up with the hole on the cover.  Using the remaining supplied allen bolt, a small dab of blue loctite and allen wrench, screw it into the bracket.

  10. Once it's screwed in you can tighten down the bracket bolt behind the powersteering pump pulley.

  11. Now you can tighten down the bolt going to the upper bracket through the cover.

  12. You're all done!  Go out and enjoy!

Contact Us:

COBB Customer Support

Web Support and Tech Articles: COBB Tuning Customer Support Center

Email: support@cobbtuning.com

Phone support available 9am to 6pm Monday-Thursday. 9am to 4pm Friday (CST)


return to www.cobbtuning.com

Copyright 2023 © COBB Tuning Products LLC. All Rights Reserved. | www.cobbtuning.com