Whiteline Rear Sway Bar 22mm Adjustable – Subaru Models (inc. 2008+ WRX/STI)

Whiteline Rear Sway Bar 22mm Adjustable – Subaru Models (inc. 2008+ WRX/STI)

The Benchmark Rear Sway Bar for GR/GV/VA Subaru WRX and STI
The Whiteline BSR49XZ 22mm adjustable rear sway bar is one of the most widely run rear bar upgrades on the GR, GV, and VA Subaru WRX and STI platform. A meaningful diameter increase over the factory bar, multiple adjustment positions for roll stiffness tuning, and hollow chromoly steel construction make this the correct rear bar upgrade for any WRX or STI build on the 2008+ chassis. Includes mount bushings and all hardware for a complete installation.

DETAILS

• 22mm adjustable rear sway bar for 2008+ Subaru WRX and STI (GR, GV, VA chassis)
• Multiple adjustment positions for rear roll stiffness tuning
• Hollow chromoly steel — high stiffness, competitive weight
• Includes mount bushings and hardware for complete installation
• One of the most proven rear bar upgrades for the GR/GV/VA platform

Why the BSR49XZ is So Popular on These Platforms
The 2008-2021 WRX and STI have a well-documented factory rear sway bar that’s under-spec for performance driving — the rear end rolls noticeably in fast corners and the balance leans toward understeer. The BSR49XZ is a direct bolt-on fix: more diameter, adjustable, and proven across thousands of installs on these chassis. Its reputation is based on consistent, predictable results.

Adjustment Positions
Multiple positions allow you to tune the rear roll stiffness to your specific needs. Most GR/GV/VA WRX owners run the inner or middle position for street and mixed track use. STI owners and dedicated track drivers often prefer the outer position for maximum rear anti-roll. Starting at the inner position and working outward is the recommended approach.

Hollow Chromoly for the Correct Diameter-to-Weight Ratio
Whiteline’s hollow chromoly construction is what allows the 22mm diameter to be achieved without excessive weight. Solid steel at 22mm would add meaningfully to unsprung mass — the hollow construction keeps weight competitive.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

The definitive rear sway bar upgrade for the GR/GV/VA WRX and STI. If you own one of these cars and want to address rear body roll, the BSR49XZ is the correct starting point. Installation is a straightforward bar swap — remove the OEM bar, install the Whiteline unit with the provided polyurethane mount bushings, connect the endlinks. Start in the middle adjustment position and move from there. Adjustable endlinks are a worthwhile companion purchase if the car has been lowered, ensuring the bar operates at zero preload at the new ride height.

What’s in the Box

• 22mm adjustable rear sway bar for 2008+ Subaru WRX and STI (GR, GV, VA chassis)
• Multiple adjustment positions for rear roll stiffness tuning
• Hollow chromoly steel — high stiffness, competitive weight
• One of the most proven rear bar upgrades for the GR/GV/VA platform

Fitment