VA WRX, WRX STI Rear Swaybar

CB-013RZ-22 – COBB 22mm Rear Sway Bar

CB-013RZ-24 – COBB 24mm Rear Sway Bar

CB-1005 - COBB Rear Sway Bar Supports

2008 - 2021 Subaru WRX, WRX STI

Congratulations on your purchase of the COBB Tuning Rear sway bar! 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

 Rear Swaybar

 Rear Swaybar Bushings

the 22mm Swaybar comes with 23mm bushings, while the 24mm swaybar comes with 25mm bushings.

 (2) Sway Bar Bracket Support

 Sway Bar Support Hardware

  • (2) m6x1.25x60mm Hex head bolts
  • (2) m6 flat washers
  • (2) m6 lock washers

Tools Needed



  • 3/8" ratchet
  • 3/8" 12" extension
  • 3/8" 6" extension
  • 3/8" 12mm socket
  • 3/8" 17mm socket

Hand Tools

  • 5mm Allen Key


  • 14mm combination wrench
  • 17mm combination wrench

Stock Swaybar Removal

  1. Park your car in a flat, level area and allow it to cool down properly.

  2. Using a 10mm wrench, remove the negative terminal of the battery.

  3. Jack your car up and support it properly, either using a lift, ramps, or jack and jack stands.

  4. Lay a blanket or cardboard down under the car, or grab a creeper.  In this case his name is Andrew

  5. You can either remove the sway bar and the end links together (if you're replacing the end links as well).  It can give you easier access if they're rusty or otherwise tough to remove.

  6. If you're removing the end links with the swaybar remove the 14mm bolt holding the sway bar to the lower control arm using a socket on one side and a wrench on the other.

  7. Next up remove the two 12mm bolts holding the sway bar brackets and bushings to the car, once both sides are off remove the sway bar from the car.

  8. If you're using the stock endlinks, use a 5mm allen to hold the center of the end link where it goes through the sway bar, and use your 14mm wrench to remove the nut.

  9. Using your 17mm socket and wrench, remove the nut on the backside of the rear lower control arm.


  1. Take a moment and apply some of the supplied silicone grease to the inside of the provided swaybar bushings.

  2. Slip these bushings onto the outside of the stops on either end of the swaybar

Rear Sway Bar Support Installation

  1. Fish the rear swaybar around the exhaust.  Install the swaybar bushing brackets but only secure the top bolt for now.

  2. Loosely slip your end links into the sway bar and control arms but don't tighten them yet.

  3. Using the stock nut loosely install the enclosed end of the swaybar brace to the bolt holding the rear lower control arm.

  4. Swing the opposite end up.  This will go into the lower bolt hole for the sway bar bushing bracket.  Use a bolt with a lock washer, and flat washer.

  5. You can now tighten up all the bolts for the rear sway bar.

  6. Go out and Enjoy!


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