Whiteline Rear Subframe Positive Traction Kit – 2008-2014 Subaru WRX / STI / 2009-2013 Forester /

Whiteline Rear Subframe Positive Traction Kit – 2008-2014 Subaru WRX / STI / 2009-2013 Forester

Lock Down the GR/GV Rear Subframe for Consistent Performance
The Whiteline KDT907 Rear Subframe Positive Traction Kit replaces the OEM rubber mounts at the rear subframe on the 2008-2014 Subaru WRX and STI with polyurethane to reduce subframe movement under performance driving loads. The rear subframe carries the entire rear suspension, differential, and driveline — keeping it precisely located is fundamental to consistent rear axle behavior.

DETAILS

• Polyurethane rear subframe mount kit for GR/GV WRX and STI
• Reduces rear subframe movement under cornering, braking, and acceleration
• Improves rear wheel geometry consistency and chassis response
• Fitment: 2008-2014 Subaru WRX, STI, 2009-2013 Forester
• Direct replacement — no chassis modification required

Rear Subframe Position and Suspension Geometry
The rear subframe’s position relative to the chassis determines the geometry of every rear suspension component. When the subframe moves under load, all rear suspension geometry parameters change simultaneously. On a performance-driven WRX or STI, this shows up as rear axle inconsistency and unpredictability at the limit.

GR/GV Platform Under Track Use
The GR/GV WRX and STI are widely used for track days and autocross. Under those loads, factory rubber subframe mounts deflect measurably. Whiteline’s polyurethane replacement keeps the subframe in its designed position throughout the cornering cycle.

Complete Rear Package
The rear subframe kit works alongside rear differential mounts, trailing arm bushings, and rear sway bar upgrades to produce a fully sorted GR/GV rear end.

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

An important chassis upgrade for any GR/GV WRX or STI used for serious performance driving. The install is straightforward but doing it correctly matters — clean the housing thoroughly before installation and apply grease to all polyurethane-to-metal contact surfaces. The improvement in drivetrain feel shows up immediately on the first hard acceleration run after installation.

What’s in the Box

• Polyurethane rear subframe mount kit for GR/GV WRX and STI
• Reduces rear subframe movement under cornering, braking, and acceleration
• Improves rear wheel geometry consistency and chassis response
• Direct replacement — no chassis modification required

Fitment