Whiteline 27mm Rear Swaybar Mount Kit Subaru WRX 02-07 / STI 04-07 | KBR21-27

Upgrade the mount support for your rear sway bar with the Whiteline KBR21‑27 Heavy Duty Rear Sway Bar Mount Kit. This kit replaces the OEM sway bar saddles with stronger forged alloy mounts, designed especially for 27 mm sway bars on Subaru Impreza, Legacy, and Outback models.

By stiffening the sway bar mounting points, this kit reduces deflection and flex under load, helping the bar respond more consistently, especially when using stiffer or adjustable settings.

Key Features & Benefits

• Forged Alloy Mounts: Significantly more rigid than stock saddles, reducing twist and flex under heavy cornering loads.

• Optimized for 27 mm Bars: Designed specifically to suit 27 mm rear sway bars.

• Improved Sway Bar Response: With stiffer mounting points, the bar can transfer force more directly, improving body control and reducing understeer / oversteer deviations.

• Durable & Corrosion‑Resistant: Built to resist road corrosion and long-term wear.

• Reasonable Install Time: ~1.0 hour.

• Warranty: 3‑year / 60,000‑mile warranty.

Technical & Fitment Details

Installation Tips

1. Safely lift and support the rear end of the vehicle.

2. Remove existing sway bar saddles / brackets and any mounting hardware.

3. Clean sway bar and mounting surfaces, removing any rust, debris, or old grease.

4. Install the new forged alloy mounts in the stock locations, aligning with existing bolt holes.

5. Torque hardware to manufacturer spec, ensuring the mounts are firmly secured without inducing stress or misalignment.

6. After driving, recheck torque once settled to ensure no loosening has occurred.

Pro Tip: Use anti‑seize or corrosion‑resistant lubricant (as appropriate) on hardware to ease potential future removal, and inspect periodically under track or harsh driving conditions.