Perrin Rear Adjustable Sway Bar 16mm 2008-2021 WRX / 2008-2021 STI / 2013-2024 BRZ / 2013-2016 FRS / 2017-2021 GT86 / 2022-2024 GR86

Here, you are looking at the Perrin Rear Sway bar for your WRX, STI, or BRZ.

Take your vehicle's handling to the next level with PERRIN Performance sway bars. Upgrading your sway bar is the easiest way to improve vehicle handling. Sway bars increase roll resistance and modify vehicle balance.

In general, adding a larger rear sway bar increases over steer, and adding a larger front sway bar increases under steer. Upgrade both front and rear sway bars to reduce body roll and tune vehicle balance to your preference.

PERRIN Performance sway bars incorporate multiple end link mounting holes which allow the installer to custom tailor your driving experience.

This PERRIN sway bar increases stiffness by a minimum of 50% overstock. Adjusting the end link mounting position on this sway bar can increase that stiffness to as much at 215% over stock.

Fitments: 

Please note, while this bar will fit the 2015-2021 WRX / STI models, however, this bar is smaller than the OEM 20mm, and will be LESS stiff than the factory sway bar under any setting. 

2008 WRX:

• PERRIN 16mm Bar Hole #1 -9% Stiffer than 15mm OEM bar
• PERRIN 16mm Bar Hole #2 25% Stiffer than 15mm OEM bar
• PERRIN 16mm Bar Hole #3 60% Stiffer than 15mm OEM bar

2009-2014 WRX / STI:

• PERRIN 16mm Bar Hole #1 -5% Stiffer than 16mm OEM bar
• PERRIN 16mm Bar Hole #2 Same as 16mm OEM bar
• PERRIN 16mm Bar Hole #3 5% Stiffer than 16mm OEM bar

2013-2016 BRZ / FRS:

• PERRIN 16mm Bar Hole #1 30% Stiffer than 14mm OEM bar
• PERRIN 16mm Bar Hole #2 65% Stiffer than 14mm OEM bar
• PERRIN 16mm Bar Hole #3 116% Stiffer than 14mm OEM bar

2017-2021 BRZ / 86:

• PERRIN 16mm Bar Hole #1 -9% Stiffer than 15mm OEM Bar
• PERRIN 16mm Bar Hole #2 25% Stiffer than 15mm OEM Bar
• PERRIN 16MM Bar Hole #3 60% Stiffer than 15mm OEM Bar

2022-2023 BRZ / GR86:

• PERRIN 16mm Bar Hole #1 30% Stiffer than 14mm OEM bar
• PERRIN 16mm Bar Hole #2 65% Stiffer than 14mm OEM bar
• PERRIN 16mm Bar Hole #2 116% Stiffer than 14mm OEM bar