Whiteline BSR37Z Rear Sway Bar 22mm HD Adjustable for 04-07 Subaru WRX & STI

Vehicle Fitment

• 2004-2007 Subaru Impreza WRX (GC8/GRB, 2.5L turbo, AWD)
• 2004-2007 Subaru Impreza WRX STI (GD/GG, 2.5L turbo, AWD)

Fitment Notes

• Rear sway bar, 22 mm diameter, 3-point adjustable mounting.
• Direct-bolt replacement for factory rear stabilizer bar on 04-07 WRX/STI.
• Installation requires removal of rear under-tray and may need rear links adjustment.
• Ensure compatible undercarriage clearance if lowered or modified.

Features

• Solid 22 mm steel bar increases roll stiffness and cornering grip.
• Three mounting positions allow tuning of roll-balance (soft → medium → hard).
• Includes polyurethane bushings with internal knurls for better grease retention.
• Powder-coated finish resists corrosion and protects against road debris.
• Enhances rear-end stability during aggressive cornering or high-G maneuvers.
• Compatible with stock rear suspension geometry, retains everyday drivability.
• Backed by a 3-year warranty on the stabilizer bar component.

Specifications

• Part Number: BSR37Z
• Bar Diameter: 22 mm (~0.87")
• Mounting Type: Rear, 3-point adjustable link arm positions
• Bar Type: Solid steel, blade design
• Bushing Type: Synthetic elastomer with lubrication knurls
• Finish: Powder-coated silver/grey
• Weight Approx.: 15.4 lbs (per manufacturer listing)
• Application: 2004-2007 Subaru WRX/STI rear stabilizer bar upgrade

Included Components

• 1x Rear sway bar (Whiteline BSR37Z)
• 2x Polyurethane mounting bushings
• 1x Installation instruction sheet

Product Description

The Whiteline BSR37Z Rear Sway Bar is engineered specifically for the 2004-2007 Subaru Impreza WRX and WRX STI models, providing a high-value upgrade to the rear roll control system. With a solid 22 mm thick blade design and three tuning positions, this bar delivers improved grip, reduced body roll and sharper handling without compromising ride quality. Whether for daily street use or spirited canyon runs, this bar gives appreciable handling benefits.

Installation is straightforward using factory mounting locations, and the included poly bushings and hardware ensure a full upgrade kit. Fine-tune the bar's feel by selecting the harder or softer link position to match your driving style or suspension setup. Ideal for owners of WRX/STI models looking to upgrade handling under load or during cornering, the BSR37Z is one of the most cost-effective handling mods you can add.