Cusco 692 311 A23 23mm Front Sway Bar for 2008-2014 Subaru WRX STI/Forester XT

Vehicle Fitment

• 2008-2014 Subaru Impreza WRX STI (GRB/GVB, EJ257 2.5L Turbo DOHC H4, AWD)
• 2011-2014 Subaru Impreza WRX (GVB, EJ255 2.5L Turbo DOHC H4, AWD)
• 2009-2013 Subaru Forester XT (SH5, EJ205 2.0L Turbo DOHC H4, AWD) - JDM
• 2009-2013 Subaru Forester XT (SH9, EJ255 2.5L Turbo DOHC H4, AWD)
• 2008-2014 Subaru Exiga (YA5, EJ205 2.0L Turbo DOHC H4, AWD) - JDM

Fitment Notes

• Fits both STI (GRB, 2008-2014) and narrowbody WRX (GVB, 2011-2014) - different OEM bar diameters result in different stiffness increases per platform
• Forester SH5 (JDM 2.0T) and SH9 (2.5T) turbo models are compatible - naturally aspirated Forester models may have different OEM bar sizing
• Exiga YA5 (JDM only, 2.0L turbo AWD) shares the same front subframe and sway bar mounting points
• Bushings included - reuses OEM mounting brackets
• Position: Front

Features

• 23mm outer diameter solid steel construction - up to 142% increase in roll stiffness over OEM depending on platform
• Stiffness increase varies by vehicle: 142% on GRB STI (vs. OEM 20mm), 132% on YA5 Exiga (vs. OEM 21mm), 127% on SH5 Forester (vs. OEM 21mm)
• Reduces front body roll during hard cornering for sharper turn-in and improved mid-corner stability
• Helps tune understeer/oversteer balance when paired with a corresponding rear sway bar upgrade
• Durable Cusco blue powder-coated finish for corrosion resistance and professional appearance
• Includes polyurethane bushings for a complete bolt-on installation using OEM bracket locations
• Non-adjustable fixed-rate design for simple, consistent performance
• Approximately 1 hour installation time
• Direct replacement for the factory front sway bar - no vehicle modification required

Specifications

• Part Number: 692 311 A23
• Type: Front Sway Bar (Anti-Roll Bar)
• Position: Front
• Outer Diameter: 23mm (solid)
• OEM Outer Diameter: 20mm (GRB/GVB) / 21mm (YA5/SH5/SH9)
• Stiffness Ratio vs. OEM: 127%-142% (varies by platform)
• Material: High-Strength Solid Steel
• Finish: Cusco Blue Powder Coat
• Adjustable: No (fixed rate)
• Bushings Included: Yes
• Installation Time: Approximately 1 hour
• Compatible Chassis: GRB, GVB, GVF, YA5, SH5, SH9
• UPC: 4996338097323

Included Components

• 1x Cusco 23mm Front Sway Bar (solid steel, blue powder coat)
• 2x Polyurethane Sway Bar Bushings

Product Description

The Cusco 692 311 A23 is a 23mm solid steel front sway bar designed for the 2008-2014 Subaru WRX STI, 2011-2014 WRX, 2009-2013 Forester XT, and JDM Exiga YA5 turbo platforms. It replaces the factory front anti-roll bar with a stiffer unit that delivers up to a 142% increase in front roll stiffness over the OEM bar on the STI (which uses a 20mm factory bar), and approximately 127-132% on the Forester and Exiga platforms (which use a 21mm factory bar). This increase in front roll resistance translates directly to reduced body roll during hard cornering, sharper turn-in response, and more predictable weight transfer under aggressive driving conditions.

The bar is constructed from solid high-strength steel and finished in Cusco's signature blue powder coat for corrosion protection and a clean underbody appearance. The kit includes polyurethane bushings for improved response over the factory rubber units, and the bar mounts directly to the OEM bracket locations for a straightforward bolt-on installation that takes approximately one hour. The non-adjustable fixed-rate design provides consistent performance without the complexity of adjustable end links or multi-position mounting holes.

This front sway bar is particularly effective on the Subaru AWD platform, where front-to-rear roll stiffness balance directly influences the vehicle's tendency toward understeer or oversteer. For optimal handling balance, Cusco recommends pairing this front bar with their corresponding rear sway bar for the same platform to achieve a tuned front/rear roll couple that reduces understeer and improves overall chassis composure. Whether used for daily driving, autocross, time attack, or rally, this sway bar provides a meaningful improvement in handling precision at a competitive price point.