• 15+ Years of Performance Parts, Tuning & Installation

Perrin [08-21 WRX/STI, 13-23 BRZ , 13-16 FRS, 17-21 GT86, 22-23 GR86] Rear Adjustable Sway Bar 19mm | PSP-SUS-230

  • Backed by real installs and tuning experience at FAST of West Chester
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Here, you are looking at the Perrin 19mm Rear swaybar for your WRX, STI, BRZ, or 86!

Prevent plow and improve handling with Perrin!

The only way to make your car turn, stop or go is if the entire available tire patch is hitting the surface at hand. The factory included what many regard to be a whimsical attempt to increase cornering with puny sway bars on the front and rear. PERRIN™ sees the need for far larger and stronger sway bars and now offers two choices for both ends of your car.

For street enthusiasts that simply want to attack the drive to work with more gusto, the 19mm upgrade is the ideal choice. While dedicated track hounds will delight in the increased snap now available from our 22mm offering. Each size and each end also incorporates 3adjustment holes to help you custom tailor your suspension to your specific needs and driving habits. Made from solid steel and heavily powder coated to prevent the rigors of salty roads that wreak havoc with less-worthy products. All kits include polyurethane pocketed bushings to prevent tedious re-greasing and all necessary hardware for a clean and painless installation.

Please note, 2015+ WRX / STI uses a 20mm factory bar, and this will be less stiff than the factory bar. 

2008 WRX: 

  • PERRIN 19mm Bar Hole #1 105% Stiffer than 15mm OEM bar
  • PERRIN 19mm Bar Hole #2 160% Stiffer than 15mm OEM bar
  • PERRIN 19mm Bar Hole #3 240% Stiffer than 15mm OEM bar 

2009-2014 WRX: 

  • PERRIN 19mm Bar Hole #1 58% Stiffer than 16mm OEM bar
  • PERRIN 19mm Bar Hole #2 100% Stiffer than 16mm OEM bar
  • PERRIN 19mm Bar Hole #3 160% Stiffer than 16mm OEM bar 

2013-2016 BRZ / FRS:

  • PERRIN 19mm Bar Hole #1 150% Stiffer than 14mm OEM bar
  • PERRIN 19mm Bar Hole #2 243% Stiffer than 14mm OEM bar
  • PERRIN 19mm Bar Hole #3 347% Stiffer than 14mm OEM bar

2017-2021 BRZ / 86: 

  • PERRIN 19mm Bar Hole #1 105% Stiffer than 15mm OEM Bar
  • PERRIN 19mm Bar Hole #2 160% Stiffer than 15mm OEM Bar
  • PERRIN 19mm Bar Hole #3 240% Stiffer than 15mm OEM Bar

2022-2023 BRZ / GR86: 

  • PERRIN 19mm Bar Hole #1 150% Stiffer than 14mm OEM bar
  • PERRIN 19mm Bar Hole #2 243% Stiffer than 14mm OEM bar
  • PERRIN 19mm Bar Hole #3 347% Stiffer than 14mm OEM bar
  • Earn FAST points on this part!
  • Backed by real-world installs
  • FAST WC Team Approved

Why Drivers Choose FAST of West Chester

  • I can't recommend this place enough. Being able to trust a shop in the performance world is big. The 2hr drive to get there, is worth knowing the job will be done right. Very happy to have found this shop, to
    support my builds going forward.

    Donald Wojnar

  • I recently had the pleasure of working with FAST of West Chester for some performance upgrades on my 2022 WRX, and the experience was nothing short of exceptional. I opted for a Borla S-Type exhaust and Cygnus Coilovers, and the team at FAST nailed the installation, fitment, and setup to a T.

    Adam Cranston

  • The team at FAST are excellence in every way. First, I consulted with Dave on mods for my HPDE track car. He listened and advised me on the best parts & mods to achieve my goals. He was patient & gave me space to research the options presented & worked with me through several changes before we built. Second, the build execution was flawless, proper heat shielding, bracing and poly everywhere. All components worked as advertised.

    Bryce Budd

  • This place has been my go to shop for all things Subaru. From simple service to performance parts and tuning, they have been top notch.

    William Brunell

  • Excellent shop. They installed a Cobb Stage 2 DP and Whiteline Sway bars and end links on my 2013 WRX. The work was done right and clean. The estimate was accurate. They were very knowledgeable, friendly and gave me the straight scoop on exactly what I was getting for the money
    and what I needed to get where I want to be with it. I'd recommend them
    to any car enthusiast.

    Devin Greco

Does it come with a warranty?

Most products we carry include a manufacturer warranty. Since we work with top performance brands, warranty coverage can vary by product. If you have questions about a specific item, reach out — we’re happy to help.

Do you offer installation help or advice?

Yes — we don’t just sell parts, we install and tune them too. FAST of West Chester is a real performance shop, and we’ve worked hands-on with many of the products we carry. If you have questions about fitment, installs, or building your setup, our team can point you in the right direction.

How fast is shipping?

Many of our products ship the same day or next business day, depending on availability. We work hard to get parts out fast so you can get your build moving without delays.

What’s your return policy?

Returns for exchange or refund are accepted within 30 days of receiving your order. Items must be in new, unused condition and in original packaging. If you have any questions, our team will help make the process easy.

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